Re: New to this Looking for a accurate Upper!
Man, if you just want an accurate upper, you have plenty of choices. What do you want it for? Do you need the tactial rails and such?
Given your budget, you could get any number of high quality uppers. Some of the bigger names as stated above, do have more accurate versions of battle uppers and they are very nice, but make not mistake, the RRA Predator models and Bushmaster varmint models are tack drivers right out of the box. My last store bought upper was a Bushmaster Predator and it would shoot one hole at 100 yards with match ammunition.
On the other hand, I've built uppers using barrels from Bravo Company, Superior Barrels, Bushmaster, Wilson (RRA), etc. and they were all MOA or better shooters.
Still, given your budget, I'd call Superior, Ranier, WOA or Compass Lake and see what you can have built. Much of the cost of getting an upper from Larue or LMT or some other military oriented builder will be in the accessories that come with the upper. If you don't need the tactical rails and such, you may be able to save yourself some money.