I haven't seen anyone mention Aero Precision yet. They're going to be a bit better than PSA and much better than Bear Creek Arsenal. PSA is really as low quality as anyone should go unless your budget is seriously deficient. AP is great whether you want to build or buy, and their barrels are...
You should really look into the Hanson profile by Ballistic Advantage! It's a taper profile so most of the weight is near the receiver where you want it the most. Makes for a midweight barrel, and it really balances out a build.