Myself along with many others on this site use a software package called OnTarget2. It allows you to input information about your bow/setup. Then it has an spine match tab that will let you look up what the best arrow or set of arrows will best meet your needs.

I am playing with it right now. I am trying to decide what my next dozen will be. For $20 it was the best investment I have made yet. Fully downloadable from the internet.