Personally, I think the 600rr is slow and anyone can push the bike to its potential, especially on the street, where 170mph just isn't good enough. You need that extra 10-15mph to really have a good time anyways. Yeah, they are lighter and easier handling middle weight sport bikes, but who needs that when it's easier to go in a straight line anyways. The 1000rr is a better choice for anyone, even beginners really. If you don't get killed, then you can move up to the hayabusa in a week or two. Just don't completely total the thing, otherwise you'll have a hard time getting anything out of it to put towards your new bike. Make sure to put a power commander, full exhaust, and a k&n air filter on it during the first couple weeks because it makes it so much faster and more powerful. Most people on forums do it for a reason, because their first sensible initial reactions are that it needs more power, and how right they are. Brakes and suspension aren't important at all, either is gear or riding ability. All you need to know is how to let the clutch out and shift through the gears (even if you suck at that) if you can do that you are pretty much good to ride any bike at a moto gp level. Those guys aren't even that good anyways, most of them started riding little 250's and 500cc two strokes...(same engines used in weedwackers). Make that move man, these 600's are child's play! Impress your girlfriend too!