Now that everyone else has had a chance to state a preference, here is my take. I don't need a .308 MBR, but I don't really 'need' an AR either. This is just something that should be in my collection for the sake of completeness, and for the off chance that I ever go 'close in' hog hunting. In order of likelihood that I will acquire:
Springfield M1A* - Ergonomics and aesthetics are big, as is the fact that it is a proven design in current production. I should have mentioned in the OP, scoping this rifle was never really a consideration.
AR-10 - Definitely the most aftermarket support and parts availability, and the greatest range of quality and price. (cheap garbage, to top of the line) The logical side of my brain says 'AR-10' every time. But... I don't know... If I go this route, it will be with a fixed stock model.
Keltec RFB - Laugh away. There is something to be said for a bullpup rifle. I would definitely need to handle one first, as ergonomics will make or break any of these choices for me. In contrast to the AR-10, my logical brain says 'definitely not,' but I really do want an RFB.
DSA FAL - Moved down to last place. I was initially optimistic, but now with DSA's quality and reputation being called into question... I have enough problem guns as it is now.
*Yes, Springfield. I have no plans to spend a huge pile of cash on a rifle that will not be a main SHTF weapon. While I welcome H2OMan's input, (no one knows M14s better) he takes these rifles to a level that I never will.