RE: fixed broadheads
Muzzy, Magnus and Steel Force Premiums no adjustment required from FP's out of a tuned bow. Others slight adjustment maybe required IME (TH's, Wasp SST, Rocky Mountain, etc).
I am cut on impact guy now, since my archery consists of Bear, Elk and Deer. Used to be an annual moose hunt as well but they have since closed that season here and it is a general or draw only with no classification. I just found the 100 gr cut on impact would do everything I needed with no need to worry or change and the fact the flight is superb with the Steel Force was added insurance.
Like everything there are a ton of good choices, like lou said you need to find the one best for you, your setup and situation.