I dont know, numerous people told me to stay away from Inline 4 600's and stick with something alittle lower to learn on. I'm glad I didn't. I hoped right on my 600 although the power was there, and it did scare the shit out of me for about a month.....haha. I didn't regret buying it one bit. I'd say get a 600. Just dont buy something brand new that you'll shed tears over dropping.
I bought my bike because of sex appeal.