Another mid range option is Aero Precision. Then you have plenty left over (like 1000) for mags, ammo, optic, etc.
Also, no AR chambered in .223/5.56 has recoil that will 'pound you' no matter how light the gun.
Heck CDNN has a deal right now for a Colt 6920 for $900. Then as I said, buy...