You know I've been thinking about this. If I had to choose just one car, money no object, to do everything I wanted. It'd be a Range Rover. Simple as that. No point having some impractical supercar that you'll barely ever get out of third gear and will spend two weeks every month being fixed or serviced. Have something you can use, that's got all the comforts you could possibly need, and can go just about anywhere.
It's quite handy for towing race cars too...