I bought my '05 in 2008 with 17K miles on it. I'm at 58K now. It would be issue free if I could keep the damn thing right side up. The original owner did have the clutch replaced under warranty due to a failure in the slave cylinder at like 5K miles.
Anyway, to me the most important thing is a detailed and complete service history. Maintenance is key to longevity on these bikes.
"Dang man I'm impressed." - Willy-B
"Are you OK? ... Are you sure you're OK?" - Honcho
"Disturbing and funny, all at the same time." - MrTwisty