Sounds like a great project! What is your ultimate goal? Benchrest? PRS type shooting?
What kind of bullets are you shooting? Reloads?
Most of the SPS barrels I have seen will shoot in the 0.6 - 0.8 MOA range which is good enough for most people but if you want to shrink the groups, a Bartlein is a good way to do it. I have one on my 6.5x47L and it has been excellent.