if you're looking for a sweet lil (smaller) dual sport, check out the drz400's. sweet little bikes, enough power to be able to do interstate time on, but not so much that it'll get you in trouble. and there's a million and one people making all sorts of stuff for them, so you can upgrade as much as you want. 250 dual sports are great around town, but if you have to get on the interstate for anything more than 5 minutes, you're gonna be hatin it.

I had one (drz400) years back that was converted to supermoto (this was long before you could buy a "factory" SM) and i loved that bike.