I hunt with my suppressed SBR (6.8 SPC II) so accuracy is very important to me. As such, the barrel I use is an ARP. http://ar15performance.com/
While a super accurate barrel may not be the prescription for plinking and home defense, I still don't subscribe the "any old barrel will do" mantra (your life may depend on it, no?). A quality barrel will ensure the chamber is right (not too tight, not too loose), among other things. In that respect, I'm sticking with something like BCM, Daniel Defense, Colt, LMT, etc.