HuntingEd....yes try those out. I prefer Magnus heads.
There is absolutely NO reason you can't tune your bow to shoot excellent with fixed heads out as far as you will probably ever shoot. I've never been able to understand why people say they can't.
Now if you personally cannot , that's ok...just find someone that can. Although many folks have alot of success with mechanicals, my opinion is they are still a band-aid for folks that can't tune their bows. As soon as someone has trouble with broadhead flight, the immediate fix is "I'm going to switch to mechanicals". Regardless of the head, you need your bow tuned correctly. And yes, many folks have properly tuned bows and shoot mechanicals with much success, but personally my money is on fixed heads every time.