Under $1,200, without a scope, but I’d like to get a few needed accessories within that price.
I'd recommend going to gunsamerica.com and browsing.
Depending on the type of shooting you want to do, one of the best optics for the money I've found is the Burris AR-332. It's got a ballistic reticle that's designed for the 5.56 trajectory out to 500 yards, has a dual illuminating reticle in either red or green, and still shows up black when you're battery dies.
Atlantic has some nice AR’s at decent prices:
http://www.atlanticfirearms.com/storeproduct556.aspx
http://www.atlanticfirearms.com/storeproduct572.aspx
http://www.atlanticfirearms.com/storeproduct347.aspx
Good source for ammo:
http://www.ammunitiontogo.com/
Take a look at CDNN’s catalog:
http://site.cdnninvestments.com/CDNN2010-6/index.html
You can drop over to www.gunsnet.net also. I’ve been a member & mod for ten years...