What are you shooting now? I' d be willing to bet that your set up is just fine. Just use a good fixed blade head.

I' m using a Parker UL35 @ 70 pounds
30" GT 75-95 arrows with either 100 or 125 grain Muzzies. Still deciding which heads to use.
Total arrow weight is 430 to 455 grains depend on head weight. Probably going with 125' s

My big " wish I hadn' t done that" was use a mechanical head last year. It wasn' t the only factor, as a few things happend at exactly the " wrong" time, but I believe it certainly contributed to not finding a very large bull last year. I' ll never use a mechanical on elk again.