I've had my K75C for about 2 years and 20k miles. She's got a click over 50K on the odo now - a baby!
I have added:
Progressive 420 rear shock and front springs
Rick Mayer Seat
Laminar Lip
Aux LED lights wired to high beam
Aux LED fork lights wired to low beam
Givi top case
GPS
Radar
DC power for gps, radar and ipod
Power for heated gear
My longest ride was from Boston to New Orleans. Here she is in front of Lake Pontchartrain, north of New Orleans.