If you're going to run optics, get an AR10 or SCAR-17. If you wanna run irons, get an M1A.
M1A hands down favorite if you are an irons guy. I despise using a scope, but that's just me.
Saturday I had a sub moa group on the X ring (slung prone) @ 200 yds with handloads in one of mine. It's a joy to shoot, doesn't destroy my brass and deposits them in a neat pile.