I like the A2's, too.. a lot. But, if somebody's trying to give me a $200-250 worth of camo furniture I'm guessing somebody's gonna want in exchange for me buying their brandy new Colt LE M4 for $760, yeah, I'll bite.
Truth is, all the T6's rattle that I've ever picked up, 4 or 6 position. Same with the Magpuls, far as I've ever seen. Makes the A2's start to look a lot better, especially if you're mounting anything larger than an ACOG, red dot, or holographic and shooting anything at distance.