Well, I ended up with a size 58 Crust bombora for whatever that is worth.
I'll chime in again once its built.
Frame weights right at 5 lbs stripped of all but the seat tube bolt, fork is a hair over 3 uncut.
Here is a great list I found after the fact.
https://bikepacking.com/index/650b-gravel-bikes/
I am currently trying to sort which crank to go with.