For that price, look at the Stag 16" Government Carbine for $1485.00 - assuming you don't want to build one up from scratch. If you build, you can get it for less money, but it's a bit of a PITA gathering and assembling all the parts and keeping shipping costs reasonable - the plus side is you would get the add-ons you want right from the start though.
Assuming no Norinco, you could build an M4gery for about $1000 worth of parts (not including tax and the shipping of various orders from Brownells, etc. using magpul furniture if you start with an ArmsEast Aero Precision stripped upper and lower. After shipping, you'll be in the $1150 range, still cheaper.... but....
ArmsEast will offer you lifetime warranty on the Stag, so if warranty is important to you, get a ready-made Stag.
I build them personally, but only because I like doing it and I like to hand-pick which parts I'm going to use.