I have probably ran more canned tunes than anyone. I have tried 11 different tunes from 3 people. ADM, Westers (Tune Tyme) and Vector.
Vector was the only company that was able to provide me a tune that did not have excessive KR. But like Darkside said, they have a hard time getting products to market.
But in the end, Vector was the one that got me the best tune. That said, I think you should consider PCMforless for a tune. If I was buying a tune, thats probably what I would do.
Have you actually ordered your stuff? If not, you should consider a IEATSRT8 intake instead of the volant.