I never got COMAND and I only do about 6000 miles p.a. tops. Plus, I quite like paper maps, which help me get oriented. I have used satnav systems and found them potentially useful, and might consider one in the next car, esp if available on DVD, so that I can have the whole of Europe on one disc.
As I said, it all depends on how much time you will spend in the car and which gadgets you would use. For example, I am glad I never went for a multi-CD-stack in the boot as I usually listed to the radio. And when I do listen to CDs, swapping individual discs is hardly a hardship. I have the basic Audio 10. The current COMAND certainly sounds interesting.
On the other hand, even if you don't choose COMAND, I strongly recommend the built-in wiring and cradle system, which takes a variety of Nokia handsets (though not the camera phones), or something very similar that allows you to operate the phone from the steering wheel.
I don't know what expertise OVS's dealer has, but where I bought my car there is a technician who specialises in comms technology and can explain all technical detail and relative merits to customers. It was vey useful!
DAS