I have a 2009 BMW R1200RT, and I must say that BMW makes a wonderful machine. It is perfectly balanced. It rides like a dream. It has ample power. I could ride it all day... And I have.
My particular bike has factory:
Electric windshield
Heated grips and seats
Lower seat
Radio/CD
Anti-lock brakes (ABS)
Electronic Suspension Adjustment (ESA)
Active Stability Control (ASC)
BMW top case
As far as aftermarket goes, I've installed:
CalSci windshield
Illium Works barbacks
CVM highway pegs
Suburban Machine lowered foot pegs
Bakup backrest
BMW tank bag
J&M Audio communication system
Gerbings Dual-temp Controller
Rowe Electronics PDM60
Clearwater Lights Darla
K&N air filter