what the heck was up with that name, anyway? Why not V-Storm?
Sounds too much like the Honda Firestorm, which is also a V twin.
SV650 is a nice looking bike, parts easily available, reliable, easy to ride BUT its not much of a step up from your B4. If you don't want anything faster then the SV is probably a good choice.
Try an SV1000 as well, there's some amazing deals on those to be had
Whatever you do... DON'T get a Hyosung!!! They may be cheaper but thats because it's poorer quality, re-sell value is MUCH lower (SV's hold their price quite well cause there is a demand for them), parts/aftermarket parts availability is much worse, and worst of all it says Hyosung on the tank.