+1!
If it's shooting that well I wouldn't touch it.
I have several out of the box rifles that shoot so well I wont do anything to them except tuning up the factory trigger and maybe camo the stock even though I'm well versed in Savage tinkering.
Take the money you would spend on a barrel and find a pawn shop beater for a project.
Of course with a little load development many pawn shop beaters are surprising.
Same goes for the trigger. Most 3 screw pre accutriggers can be tuned up to be surprisingly good. There are instructions here somewhere to do just that.
The Choate ultimate varminters and ultimate sniper stocks are heavy as all get out and have solid steel spacers in the butt. The tactical is a little better at 3 1/2# and uses plastic spacers but still much heavier than a standard sporter. If you plan on using the rifle for anything other than a bench toy these stocks may not be as practical as you might think. Good luck and do as you wish but my .02 would be to leave it alone shoot tiny groups and grin at the $$$ guys with the fancy stocks and barrels. Thats a sport in itself that I enjoy a lot.