The FZ6 and FZ6R are inline-4 600cc bikes with detuned supersport motors and more upright riding position. The GSX650F is also an inline-4 in a small sport-touring format. Otherwise the 600cc inline-4s have race tuned performance and aggressive riding positions that make them more difficult and less comfortable on the street.
The above bikes compete with the 650 twin bikes like the SV650, Gladius, Ninja 650r and EN-6R.
Super-motos and Dual sports both look like alot of fun. They have much more sensible speeds for street and urban use, however I have heard from riders that wheelies, curb jumping and general hooliganism is much too tempting on these machines. So tickets are not necessarily avoided, though I would guess you are less likely to kill yourself.
Craig