Get a tomahawk! lol
My opinion, you would be happy with any 600. SS or ST. I ahd an RZ350. First bike, leaner bike (srsly don't know how i didn't crash on that.... Nothing like a two smoke off the line! Not to mention th wheelies. I never tried to wheelie, it just did them when quick off the line, Low end tourqe!!!!!!) But when I got my first 600. It was pretty intense. Aceleration was a little slower off the line then the rz, but the highend was horrifying at first. LOL. Liter bikes seem pointless to me if you drive in the city (don't hate on me ) but its pretty much 1st gear until you get where ever your going. And price out insurance b4 you buy any bike!
be sure to let us know what you get