CBR600RR is a great bike. I bought an 08 after having an 08 Ninja 250R for about 8 months. Its a different kind of beast though. I prefer the look of the CBR600RR compared to the CBR1000R, so I assume you do too thats why the 1000 is not on your list. Suzukis are nice, I like them, but I just prefer Honda.
As I say: Only one way to know. Go ride THEM ALL... And if a dealer gives you a problem, go to a different one. Most cc equivalent machines are very similar. All the Jap bikes are very similar, even the Triumph Daytona is very similar. If I were you I'd go feel the difference between a twin and a 4. SV1K vs. ZX-6R vs. GSXR 1K or something like that. Really throw some stuff in the mix, and you might discover something about riding position, when and where the power hits, etc, etc of what you really want, eh?
the only thing i can do is sit on them, becuase the new bikes at the dealers wont have any oil or batteries. i have ridden an older cbr, and i like it alot, and a vtx1800 which is a different type bike. i really want a liter bike, maybe the gixxer or r1.
Well as I've already stated, I'm going for the '10 Ninja 650R, only because I'm looking for a more comfortable ride that that will carry Wifey as well. That being said, more power is always a plus if used in moderation!!!
I have to ask though, why are you considering the move up from the 250? You have only just bought it recently, no?
I have a 1991 ZX 1100 in my shop this week Complete with a big bore kit Falcon rods and crank and GIANT flat slide carbs. the beast must weigh 700 lb and have 200 hp.It makes my 250 look like a bicycle.
THAT is a bigger bike.