Ok, here's my $.02...
I prefer the DML M1A2, although I haven't seen the Italeri one yet. The Trumpeter kit is not bad, and they certainly share a number of features (mold sharing?). The Trumpeter kit, however has some parts which are less than adequate. In particular, the headlight guards are about twice as thick as they should be. I also didn't like the gun and mantlet construction. The muzzle had some serious mold parting lines too. Its not a bad kit, and certainly better than the Tamiya as far as surface detail, but the DML kit seems to be more refined. On both kits, however, the M240 MG seems to be a bit oversized. Perhaps stealing one from a Tamiya kit is in order!
And those link & length tracks are no fun and the rubberband tracks aren't much better. The detail of the link & length is decent, but as Major G said, those bumps in the center of each track are just wrong... the rubberband tracks have considerably less detail.... You do much better ordering the AFV Club T158 workable link sets for another $10. They're well worth the price!
Ok, end of rant.... My M1A2 is being finished as "X166" from A/1/10 Cavalry, 4th ID. I'm trying to decide whether I want to do a diorama of it being offloaded in Umm Qasr or in Baghdad... decisions decisions!
Later!