It is tough to pick a team based on who the coach is. The coaches move as frequently as the players. It is such a crap shoot out there.
I agree that is why I say go with the top club with a proven track record and like it or not you have to be locked in at these tryouts and really look at the talent on the field and watch the coaches at the tryouts this is really all you can do. And at this age you have 2 years or more to work out the details of finding a club for the next big 3 years after that.
