It scares me when people say a 600 supersport makes a good starter bike
It's like sticking a 16 year old (or a comedian, ha ha) in an Enzo and saying "ok, figure it out". That's a recipe for disaster.
I've had my '01 F4i since, well, '01 and it's way too much for a beginner on the street. If people think a 600 isn't that fast or only a "real man" rides a liter bike, they just aren't riding the bike like it was meant to be ridden. I've taken mine to a lot of trackdays and just pushing it to 75% on the street around a corner and rolling on the throttle short shifting it puts you WAY over the speed limit very quickly.
Just be careful and make sure you take that MSF class right away. Every motorcycle rider will crash eventually when you are least expecting it, so be prepared (ie. shorts, sandals, tank top, no helmet = darwin filter).
And take it to a trackday once you get comfortable and want to really go fast. It's safer and much more fun.