I've run through all the books and videos and would say that my shooting style is a combined product of each. But if I had to pick just one knowing what I know now it would be the Welch stuff. The shooting style seems to be the most straightforward--much like shooting a compound. From Asbell, I use the same grip. It just gives me the best accuracy even if my shooting style isn't exactly instinctive. From Furguson, I use his sighting advice and recommended stance.

I'd say read and watch it all. Experiment with all of it and find what works for you. The fun is in the process and you're never totally there.