I'm with ZZR on this. My only experience is with Nesba and I think they're great. Very professional and disciplined. I really should take more advantage of getting their control riders to critique me, which they are more than happy to do. But I have this thing about learning on my own. One thing you may or may not like is that I've heard it's difficult to get bumped up to the next level. I'm in the beginner class, but I actually feel very comfortable in it. It's still plenty fast for me. In the end though, it depends on what you're looking for. If you just want track time, join multiple clubs that frequent the tracks close to you. If you want to learn to ride better, you can't go wrong with Nesba.
PR