Husqvarna 510 or 610. Or KTM 690 SMC. Both are street legal and both have street and dirt setups available.
I was really considering the KTM 690 SMC. The only bitch is that I'm 5'7" with a 30" inseem. An the KTMs seat height is at 36" or 37."
Read a review when I was first considering a SuMo where the tester was 5' 8" w 30" inseam and he said that while it's a stretch when stopped it's pretty perfect when riding.
YMMV
Faster, faster, faster, until the thrill of speed overcomes the fear of death. ~Hunter S. Thompson