For that ratio of road to dirt, I would probably just go with a straight road tire that is 700 x 32 / 35 (if the gravel is not too technical).
As noted, the Specialized pathfinder Pro would be another option as it has a slick middle. Also maybe the Vittoria Terreno Zero in a 700x35.
Vittoria terrano dry is pretty good for road and gravel also. The terreno zero is nice, but doesn’t cut through sand as well as the dry
No experience but Payson McElveen recently toughted the Maxxis Receptor. I’m definitely considering a pair to try out.
One other grand to consider is the trek checkpoint. It’s a relatively aggressive gravel bike, which makes a decent transition to road. Probably not the best choice for a crit, but otherwise, it will be great. I love mine.
You’re getting some good suggestions on tires. The first point to consider, though, is the off-road terrain. You wrote “light dirt” but is that accurate? Bear in mind that getting a groadie will open more options and, like @sryke and @dubadai with their sweet rides, you might find yourself on more not-pavement options. I started with WTB Byways (slick middle) but switched to WTB Ventures because I needed the additional grip they provided on gravel / dirt / roots / rocks / mud / slick mud / light snow etc that I ride on.
This leads to the second point: tires are (relative to the bike) “cheap.” Just make sure you’re getting a frame that can handle the volume of tire you think you might want.
And third, wheel set matters, which you keep seeing, too. Get the frame that can give you the clearance you want and, if possible, the wheels that’ll give you the performance (strong suggest on tubeless). But then the wheelset can be the joyous upgrade later on 
something to look forward to.
Since we’re posting pictures 
Thanks for the suggestions. The tyre request was really to as a go to option for some exploring/mixed terrain, not to ride all the time. For a dedicated gravel ride, I’d go for something more specialised (likewise, for a pure road ride, I’d just whack on some Conti GP5000 28s). Tyre clearance of an absolute minimum of 40 is a buying criterion. Wheelset (for gravel) will be some 2nd hand Hunt alloys until a later date.
if I get the 3T Exploro RaceMax will all my rides look like that? That would be advantage 3T over the Cervelo Aspero 
I have a Domane 2020 with two wheelsets. Bontrager Pro 37’s a set up with 28c tires and the Original Aluminum set with 35C tires ( Schwalbe G-ONE Allround) for gravel.
I’ve done 30 -40 mile gravel rides. I ride about 20% gravel and the rest on road.
If I did more gravel, having a tire larger than 38C would be ideal.
There are no % to % tires.
There are tires that roll fast. There are tires that can handle soft surfaces. There are aero tires. There are …
Some XC MTB tires will roll like a TT tire, but they are not aero. You can get a knobby 28c tire, but it’s going to be crap off roads. Light dirt means a lot of things to folks. If it’s a compacted, groomed dirt road or San DIego, you can run 28-30c; afterwards you start to need a much fatter, less aero tire quickly. If you’re going on a nice smooth walking path, you’re at 38c already. The best 38c tires @40psi are going to cost you about 1mph on the perfect road, but be enjoyable. The best 32c road tire @ 65psi is going to sink as soon as the surface has some depth or even small bumps.
I’d say get a wheel set for gravel and a wheelset for road.
Read all reviews on this tyre and ended up ordering a pair…
Good review: Vittoria Terreno Dry in review | GRAN FONDO Cycling Magazine
I see a QUARQ TyreWiz there 
Its one of those things I want but can’t justify… haha
On the other hand, seeing how sensitive the differences between pressures for gravel is…
What do you think of it?
EDIT: and they work with Wahoo https://support.wahoofitness.com/hc/en-us/articles/360000337219-Pairing-Quarq-TyreWiz-Pressure-Monitor-with-ELEMNT-BOLT-ROAM
Yes, I guarantee it.*
*Some travel may be required.
Dolomites area
I’m neutral on recommending them. I have become somewhat dependent on them and question why I don’t have them on my road bike, too (oh right, because aero, looks, lighter wheel is more sensitive to the weight, cost for a second pair). The wiz does allow me to adjust pressure based on trail conditions and temperature (0C and below, pressure drops 1.5 - 2psi as it gets colder), which is really nice. It also allows to me to dial in the differential between front and back tires, which, for me, is having 1.5psi more in the back. Can I feel a difference between 1.3 and 1.7? No, but I’ve become the princess with the pea under her bed and feel the ride is different when the tires have a 0psi or 2psi difference.
These things are also handy when the pressure drops. However, and I’ve contacted Quarq about this, there is no beep when the pressure drops. The doohickeys do have red and green lights: slow red blink means pressure is below the range you set; fast red means the pressure is above; green blink means in the range. Quarq told me to just look at the lights, which is hard when you’re rolling (flat or downhill) and the lights are on the side of the doohickey. Anyway, you can add the pressure to the Garmin (and I suppose Wahoo) screen and there is a visual indicator when you’re outside the range when you are looking at the data. I’ve developed a leak on a rocky downhill and the pressure dropped 20psi (!). At the bottom I thought something was wrong and voila… More often, I’ll think something got squishy and suspect a leak only to swipe to the screen on my Garmin while still rolling to find the pressure has or has not dropped. That’s a long story to say they are great for starting the ride, for returning to desired pressure after a flat, and provide some value during the ride. They do provide another data point, which for me has helped me dial in the pressure I like for different rides and weather, which I like, so I’m happy with them. Are they worth it? If you already have a digital pressure gauge, probably not unless you want to know your pressure on the ride (like on very long rides, in weather conditions, etc).
I like the tyrewiz. It helps me set a range where I can feel confident in my tire pressure. Also pumps can be all over the place, so what is 40psi today might be 38psi the following day.
They talked about this on a recent Cyclingtips podcast. Their conclusion was that yes, it’s possible but it depends on your priorities, you won’t change those wheels as often as you think, and a groadie bike will never be as fast as a racing bike like a Venge.
Kanzo fast is as aero as some aero bikes
Interesting. Don’t suppose you know which episode?
Yep but the rider position is higher so will be slower.
That said I can’t wait until my Kanzo Fast Ekar arrives 
