RE: fixed or mechanical broadheads???
Brad, all I can tell you is that you haven't shot enough fixed blade heads. There are a huge number of fixed blade heads that will hit the exact same spot as field tips. No question about it.
Bullmoose, absolutely correct. The number one most important thing is to have the broadhead, no matter which one you choose, is to have it go exactly where you aim.
Like I said, I use to be a big fan of mechanicals because I didn't understand fully the tuning process and I could get mechanicals to fly pretty good. Now that I have been much more involved with archery and understand tuning, equipment selection, etc... I have found that a good fixed balde head is the best choice.
It's one less thing that isn't nagging me in the back of my mind when I draw on an animal.