I recently upgraded from a Bolt v1 to a Roam v3. Overall, when I looked at the market, my impression was as follows:
- Garmin, Wahoo and Hammerhead are great options.
- There are other manufacturers (such as Coros’ Dura), which are good, but aren’t yet supported by TR yet. That may change in the future, though.
- In terms of functionality, I found all of them more than sufficient. E. g. none of the extra features at the time would have swayed me one way or another.
- The only exception might be the new lane feature you have with the new Garmin Varia radar coupled to Garmin head units (I hate that features become vendor-specific). I lost my Varia 515 last year and replaced it with a Wahoo Trackr radar as the latter has a much longer battery life and works equally well.
- I went with Wahoo for two reasons: I still love the Zoom feature and Wahoo gave me a 40 % discount.
- My Roam v3 can be used with both, the touch screen and the buttons. Love that.