I wonder whether just a few changes would be sufficient to improve the overall feel of the car for you - a shorter shifter and a new steering wheel are my initial thoughts to update things. If you change everything else but not those two items, I wonder if you'd feel it still seemed dated inside.
Found this website with interior shots from 50 high-end autos...
http://www.bmwblog.com/2008/10...uxury-cars-interior/
Brushed steel highlights when used judiciously can really complement the leather. Moving some of the switches down onto the console behind the shifter instead of having an ashtray also appeals to me, but that may be impractical depending on arm length, the engine hump, type of switches desired, and whether you rest your arm there when you're at 'cruising' speed.
This should be an interesting thread, keep us posted as you progress and gather ideas!
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