Before you buy anymore bikes, throw a leg over a DRZ400SM. You should be able to find a used one you can go and sit on. Or a WR250X, the supermoto version of the wr250r. Kawi made one aswell. Even with pure street tires they (supermotos) are very capable in the dirt. The lower seat height that the 17" wheels give you is a definite plus. Of course 50/50 tires can be had in 17's and will let you deal with a little mud here and there and still have heaps more traction on pavement than skinny knobbies. Oh, I think you should get the DR200 if you are truly only looking at those two.