Thx 4 the input guys, I appreciated all comments.
As I said before, I found the BT 2001 quite satisfying. I'm aware of the fact that maybe it's better to await the model(s) 2003 but for me there's ofcource the financial aspect too (kiting is in fact an expensive hobby but it's sure worth every penny of it!); it's a fact that you can make good deals now on all the models 2002...

I my opinion the bigger sizes 12.2 and 15.5 are way to slow. I use(d) both and had the chance to test the X2 last weekend and after that you don't want to ride the BT anymore.