To wrap up this story, I visited the one in Gretna and didn't buy anything there. The guy working the sporting goods counter was trying to sell me on a DPMS. Nothing wrong with that, except he claimed the $600 DPMS is one of the better brands, everyone else is copying DPMS, and that Colt has only been making AR-15's for a couple years now. They lost a sale because of that guy.
I ended up at Cabela's to look around and walked out with a Sig Sauer M400. It's a nice gun, lots of Magpul stuff on it, and has a lifetime warranty.