I have a wet dream for a car, too, but a bit more modest. BMW M3 would be my dream come true. Not sure I can ever afford a $65,000 car, but its at least not out of the realm of possibility. A man can dream.
They lose their value rather quickly: http://www.edmunds.com/bmw/m3/2009/ Also, episode 5 of the Neutral podcast has a lot of BMW goodness: http://neutral.fm/ The podcast is basically a bunch of programmers and tech geeks that decides to start a podcast on cars. Amateur enthusiasts. I dig it.
Worst on the market or best depending on your perspective. If you buy a relatively new 2 or 3 year old model you can get an incredible car at a comparatively great value. When I buy my next car, a three year old BMW will be on the short list of cars I check out I'm sure.
M3s are beautiful cars. I consider most BMWs over priced, but that was may even be under priced for the quality and power that comes from that thing. My co-worker drives an older used one that he put a lot of work into and that thing is STILL a beast. The new ones are just jaw dropping. A fine choice. I've always been an M5 fan because of the older style ones that were a little bigger and boxier. But all the M series ones are beautiful and fast cars.
My friend is an engineer at Borg Warner, who makes the turbo chargers, so I got ahold of their new brochure for the 2014 M3. They're switching back to a turbo I6 with a few less HP but over 100 more ft-lbs of torque. Makes me a bit drooly. I figure I can afford one around 2017 with some good luck.