Go the xr's . I had xr650r they way better handlein then the 650l models. as they just old xr600 bored out extra 50cc. xr650r model with alloy frame way nicer.
Michal byrne won the aussie thumper nats on xr650r back n 2000. when yamaha's had yz426 n 2000. everyone bagged the xr's out. But the xr650 won series in the end thought was cool!