The XB9R was produced up until the 2009 Model Year.
The 9 motor is really one of the best motors produced by Buell. It didn't have the low end grunt of the stroked 12 motor (same bore longer stroke), but it was MUCH smoother.
The only new bikes coming with the 9 motor are the SX. The City X (XB9SX) is a fantastic commuter/urban bike. Good low end torque, smooth engine, low fuell consumption (55-60MPG).
I have three XB9SX bikes waiting. Two Red, one Blue.
You can do a big bore kit for them and get very good power and torque out of these motors.