What do you want it for and in what caliber and configurations>
Defense, target, hunting, SHTF, or just to say you have one?
I would also advise people to get the .22 cienor kit for the AR. Saves tons of $$$$$$$
Someone above asked what my budget was, in my post I said $1,200. Can go up a bit if I need to.
I also like the Bushmaster AR-15, but honestly can't tell the difference between it and other AR-15's out there to justify the upcharge for the Bushmaster.
the best all-round gun is the 22LR followed by the AR15. Not too many suburbanites are going to be taking out elk deer in a SHTF situation.
Consider small game and defensive. 22LR hands down.
I have both.