I'm picking up a 550 myself this weekend. Wicked machines, but they can be temperamental. You really need to know what you're getting into.
It's literally a race bike with lights, and needs to be maintained accordingly. Extended highway riding is also not recommended, nor is it comfortable.
Recip, I'd like to take you up on that, since I plan on racing it.
Here's to hoping I can avoid an HTA172
When you've got it, let me know,,