I guess I'll just agree to disagree here, again: I'm not trying to bash... but I've never wrecked a bike. I've only been riding 3 years, but most people wreck within the first. It doesn't have to be that way. The idea of getting bored on a 600 seems silly to me. What year ZZR were you riding? If it was the old ZZR, then yeah I could see you getting bored of that. However if its the same generation as mine (2005-2008), then there is no way! (I might be a little biased) I'm not against starting on a 600, I did so myself on a 98 honda F3. To suggest starting on something bigger though, thats just silly. In fact, I'm convinced I will never want a sportbike bigger than a 600