What country/city are you in? Will you be riding a lot of freeway, or mostly city streets and smaller undivided highways?
I just came back from Spain. While there I thought, damn, if I was living here, with the narrow, twisty, cobble stoned, and congested streets, I’d ride a supermoto or a dual-sport for sure. No place to go fast on a sportbike until you get out of the city. But of coruse, being a tourist I stayed mostly in the old town area. I don’t think a supermoto is an ideal “only bike”, though, if a lot of freeway riding will be involved.
I just sold my 01 GS500 to a student from Denmark who’ll be here (San Jose, California) for the next 6 months. He said that he had an 04 R6 before, but found its power was too much, and it was very diffciult to turn at low speed, so he decided to get an easier-to-ride bike like the GS500.