My opinion is to build one yourself. Buy a Stevens action or donor rifle for $250-300, a Shilen or Criterion prefit barrel, and the stock of your choice. A rifle Basix Sav-1 trigger, and youve got a great rifle with quality custom barrel in caluber of your choice.
When barrels can be had prefit to simply screw on, I'd pick a swift...why not? $300 for 1200 shots? Only $0.25/round for barrel. Of course, a 223 will only be $.05/round for the barrel...