Re: barrel
Assuming you're talking about a match grade stainless barrel for a precision bolt gun, pretty much all of the major barrel blank makers seem to have settled in on about the same price point. So take your pick of Rock, Oby, Bartlien, Krieger, etc based on personal preference or what's in stock at the time. In the end your choice is likely to have very little overall impact in the level of success you have.