M1A all the way, I've shot M16A2/A4s, M4s, AR15s, and some AKs and for me the only thing thats more fun to shoot than my M1A Scout is a belt fed weapon which are hard to come by for $1500 (ok more like impossible).
Best investment I've ever made in a firearm hands down.
NCO of Marines, 3rd Award Expert Rifle, 236 KD Range
D Co, 4th CEB, Engineers UP!! OEF 21JUN-20SEP2011
REV. 19:11 And I saw heaven opened, and behold a white horse; and he that sat upon him was called Faithful and True, and in righteousness he doth judge and make war.