Chef Jeff,
To be a contrarian here-I would worry less about the name on the barrel and more about other factors--absent a defective barrel, most AR barrels will easily shoot 1-3 MOA at 100 yds. For self defense that is more than adequate as it would be rare to have a self defense shooting at distances greater than 25 yds and I can pretty much guarantee that self defense shootings will not occur similarly to punching holes at the target range using a benchrest. Likewise, unless you are doing small varmint hunting at long range, that same level of accuracy should serve well at most hunting w/ a .223 caliber within the 100-200 yard range.
The nice thing about AR's is that you have a lot of choice at very attractive price points and it is relatively easy to change out a non performing barrel with standard AR assembly tools. So unless you are planning a trip to the sandbox, hunting in a jungle, or figure a Red Dawn type scenario, you will probably do fine with whatever you choose under $200.
IMHO, in the end, figure out how you are going to use the rifle most frequently--asking yourself such questions as what is your comfortable carry weight and for how long, are you using iron sights or not, do you want a threaded barrel, would you like to be able to install a bayonet, do you want a military look, does the seller have a good return policy and good reputation, are you worried about resale value, how much are you willing to risk making a mistake of getting a barrel that is not optimum for what you are using it for, and so on.
Here is a pretty good link to an unbiased look at barrel considerations that is not brand specific.
http://neverenuffammo.com/ar15-basics-choosing-a-barrel/