+1 on the riding course.
Since you're a noob I'd suggest NOT buying a new bike. Chances are you're going to drop it at low speed and it won't hurt as much if it's a slightly used bike rather than a new one you brought home from the dealership.
The performance of all of the japanese 600's are going to be quite comperable, especially for a noob that's not going to ride it anywhere near it's max. Unless you're partial to a particular brand or color scheme/style I'd suggest sitting on them all and finding the one that's most comfortable for you and that you can ride all day.