I’m in a similar quandary and I’m coming around to just riding on AR46mm LB all the time.
I have some LB AR35 ultralight rims sat a in box, the idea was they would be better in the Alps where high winds made me a little nervous on the AR46. They’ll build 200-300g lighter but it’s starting to feel like an extravagance for a few days of the year and are only marginally shallower.
Unpopular opinion but ride the new bike for a while (you haven’t even got it yet) in all weather before you blow $$$ on a wheelset you probably (definitely) don’t need.