The 02 CR250 is the ticket, ergonomic, suspension, and handling wise! BUT the 02 (and newer, but ESPECIALLY the 02s) CR 250 engines were tempermental and were down on power considerably compared to the 01 and older models. they switched to a Case Reed design and the electronicly operated RC exhaust valve.
The YZ 250 though, that engine is considered probably the best 250 engine period. The suspension, handling, and ergonomics arent quite as good as the Honda but not far off by anymeans. This is my recommendation! Its also a VERY reliable bike, alot of people I know praise how well their YZ 250s and how they hold up.
The TM...well I cant help ya there because I have no idea about that brand at all, they are pretty trick looking...lol thats as deep as my discussion about them goes!