Post your question in the supermoto section for some good answers.
I just picked up a 560smr - stupid fast, power wheelies throught the first 3 gears not even at full throttle. I haven't been in 4th - 6th yet - I'm trying to break it in slowly
The SMR bikes are very maintenance intensive, oil changes every 4-500 miles, valves all the time, etc.. you have to really want one to get one for the street. Mine is being converted for the street right now.
Get a KTM with an LC4 motor if you want a normal maintenance schedule and to be able to cruise at highway speeds all day long.