Tough choice....
- Audi S8
- MB GL 420 CDI
- BMW 335 cabrio (e92)
....of course all of them insanely loaded with extras. That pretty much covers all eventualities. I would not consider a supercar, they are uncomfortable and useless on an everyday basis.
To Ricerammer: sooooooo, which of those are your three cars? And more disturbing.....how on earth can you put a Zonda and a Jetta TDi on the same list?