Looking for a newer bike to play around w/ on a supercross-style track that I am building. Haven't been racing in about 9 years (125's), and clueless to updates & changes on 250 MX'rs. Prefer a CR or KX, and am going to look at a pristine '99 CR this weekend. Any pointers on what to expect or avoid? I am open to getting a bit new of either brand if it really makes sense for the extra money. I don't think I will notice, personally.