I'd wait a year, now is not a good time to be buying ARs. Obama had a big chance to announce a new AWB 2 weeks ago when he wetn to Mexico. Instead he said he would not seek a new ban. They (dems) are worried about losing congress. I still a new ban could well be in our future, but there's a decent chance it won't come in the next 2 years.
If the AR bubble bursts, we could enjoy the flip side of this whole "supply and demand" thing that people keep posting about.
With that said, if I had the cash I've love to pick up one of those DPMS .308s. Mags would be tough to come by, but that's a hell of platform.