If I were you I would go with the KTM EXC line.
Its meant for enduro and with the wheels, tires, and brakes its a great road worthy SM. The SMR's are better track oriented bikes with the suspension and close ratio tranny but on the street neither bike can really be pushed to its potential so you won't come up short with the EXC.
I have the EXC and its perfect on the road. I also have the dirt setup that came on the bike and its a 1/2hr job to switch it all over for dirt use. Pretty much the best of both worlds.
06 KTM 525EXC (Motard)
07 Suzuki GSXR 1K (Black/Orange)
07 Suzuki Hayabusa (All Black...)