I was recently looking for something in .308. I originally looked at a couple AR-10 models... but the price and relative unreliability of them, compared to the AR-15 platform turned me away.
I was looking very closely at the FAL style rifles, the only downside again, was price - I didn't really want to get a CAI model.
I really like the M1A styles and it was a close runner up.
In the end, I ended up not going semi-auto, and went with a Remington 700 bolt action. The price was right, and my plans for 308 are for longer ranger precision shooting. Don't really need a semi auto for that. The FAL platform would be nice, but if I need something more powerful than the AR15, I can go with the AK in 7.62x39... not quite .308 power, I know... but more than enough for any kind of close work I would expect to encounter.
If your choices, I'd probably go with the M1A, or MAYBE the Rock River AR-10... but is there a reason you haven't included the FAL in your list?
Glock 26 G4 | Glock 19 G4 | Glock 21 G4 | Glock 20 G4 | Smith & Wesson M&P 9 Pro | Smith & Wesson M&P 22 | Sig Sauer P220 Elite Dark | Sig Sauer P226 MK25
Daniel Defense DDM4 V4 | Arsenal SGL 21 | ASA SBR w/ Side Charger | Mega/PSA M4 Clone | Remington 700 SPS Tactical | Savage Mark II FV-SR
Mossberg 590A1 20" SP | Mossberg 590A1 18" GR | Mossberg 500 Cruiser