After going through the news threads I have to change my mind on upgrading to a bigger bike.
Since most riders here are new to the riding community I think you should keep your 250 until 2015. By then you will have gone through all your crashes and learning curve and be ready for one of the coolest bikes I've seen since the 82 Katana.
http://www.visordown.com/news/article.asp?UAN=6854&v=1
I'm not sure if it is a bike or a giant squirt gun but it is wicked kool!