I have the 2009 SXV 550. I have had no problems with it after about 2K miles. I have done two track days as well. I do the oil change every 500 miles. You have to remember it was built as a race bike. Treat it as such and it will be fine.
It's all how you look at it. It's pretty light, it's fast, and it super fun. Take care of it and enjoy it. If you want something you can just ride and not worry about it get a Honda sportbike. LOL ( that's my other bike) FYI, I would only get the 2009 or newer and stay away from the other years. Dealer set up is key to this bike also. Most people also overfill the oil. Take the time to check the water level. Then warm it up, check the oil level and off you go. It's like checking tire pressure and lubing your chain. No big deal. I love my bike and have the biggest smile on my face all day long.
Don't know if this was any help. Good luck on your search.
Awwww I love the smell of 2-stroke in the morning.
"Worked all week, it's time to play, gonna get a little sideways" Dierks Bentley