OK, here's the deal. You have waited too long for a good deal on an AR. Sure they may come down in a few months, but then again, we are in new country here, and you might not be able to get one, period in a little while. Ask yourself if you even need one, and if you do and have the money, get the Colt, but only if you have money left for ammo.
As an alternative, you might be better off to go buy a couple of Glock 22's and maybe a Glock 17 or 19 and some extra mags and ammo. If it gets really restrictive, a few extra pistols may be better in the long run then an AR. A good boltaction or leveraction sporter will probably serve you as well as the AR, anyway.