In my opinion, the best freestyle uni for you to buy is the Miyata. I still feel that the Miyata is the best freestyle uni besides a custom frame. It has a square fork and the 20 inch wheel works perfect for skills. When I had a Miyata I passed levels 1-8 on it in one year.
The LX and DX have also have squar frames and optional 20 inch wheels, i bet miyatas are prettty good, but I have only had one unicycle the LX but I have wriden a DX and I love them both. I'm sure I am going to stick with torker line for a while. And thanks for all of your tips and advice.