I’m also interested in hearing opinions about this being the best route, or if a 6mm ARC is the ticket.
JMHO
Kinda depends on what you really want to achieve with it & it purpose in life, maybe just a project for the sake of a project.
Absolute, pure ballistics favor the 6.5, but at a penalty of more recoil, bigger, heavier, bulkier more expensive platform & there's just no getting around that.
The 6-ARC has the advantage of less recoil, smaller, lighter, less expensive, more portable package. Biggest issue might be really good, reliable magazines, but time will likely solve that problem.
Similar but really 2 different animals.
I'm not going to do either for the time being, given availability of ammo & components & I like the 22 Creed also.
Like I said earlier, if I really wanted a great 6.5, that deal on the GAP rifle that I posted, with what is coming with it, is a good buy, IMO. But nonetheless, still a lot of money.
MM