At 350, I would buy a Mini-14.I wouldnt pay retail for a mini, but they can be had for $400-500 pretty regularly. I once got really lucky and bought on for 350.
The AR 10 is more modular than an M1A, but the M1A doesnt really need to be modular..nor does the AR10 for that matter.
I like being able to swap out the grip, trigger, sights, and handguards when I want on an AR-10.



