Also check out my thread where I asked a similar question:
I had different requirements than you: vesc-only - no closed-source ESCs need apply.
Still some good input tho: Picking a builder - picking a board
I wound up going with the Demon 2.0 that was mentioned above.
It hasn’t arrived yet so I can’t tell you what I think yet.
It doesn’t sound like you’re interested in that one, but I’ll still say if you go that way make sure you ask how long it will take to get it in your hands I didn’t do that.