Larue.
Seriously. Lots of reports of sub .5 moa on other forums out of Larue Stealth uppers/barrels.
Or, for your budget, build yourself. Get a premium barrel that guarantees sub moa, a premium trigger you like, and a nice BCG. Build it, and you're off to the races. Honestly, for your budget, I'd build one myself. That way you get exactly what you want. Or buy a premium complete upper and build your lower (that way, you get the trigger, stock, and grip you want).
Seriously. Lots of reports of sub .5 moa on other forums out of Larue Stealth uppers/barrels.
Or, for your budget, build yourself. Get a premium barrel that guarantees sub moa, a premium trigger you like, and a nice BCG. Build it, and you're off to the races. Honestly, for your budget, I'd build one myself. That way you get exactly what you want. Or buy a premium complete upper and build your lower (that way, you get the trigger, stock, and grip you want).
I'll take 1/2 MOA. Whatcha' got in mind?