Which bike is the next logical step up from a kawi ex500? I'm 6'1" and 180lbs so the ex500 feels a little cramped on longer rides. I love the twisties and can confidently use up most of the ex's tires in the turns (still in my first season of riding though). Is the SV650S a good choice or will the difference in performance between the two bikes not be noticed? A 600 supersport is out of the question since I'm under 25 and couldn't afford the insurance.
+1 on Smitty's comment. I would first go an sit on the bike for awhile and see how it actually feels after sitting on it for maybe 30 minutes. There will definitely be a noticeable difference in the ride and power of the bike.