I would go back to fixed heads If it were me. I think the fact that a mechanical head is subject to fail weighs heavy on most peoples minds.Thats not saying a fixed head cant fail, but for me ,I rest easy knowing I dont have to depend on the mechanics of my head..
In the past I've shot thunderheads 125's. This year I'm goin to try some slick tricks. The montecs and wac'ems are also supposed to be great heads.I'm sure you will get plenty of opinions. Good luck.