Mike O. 
1997 BMW M3 Sedan 4dr Sedan
The Ultimate Driving Machine
 There have been few purchases (<5) in my life that I have absolutely no regrets about.  This tops the list.  Everyday when I get behind the wheel of this car I am elated.  The response is like no other vehicle I've driven.  The flat torque curve starts you off at 200lb-ft and the acceleration is fantastic. Handling is phenomenal; double suggested speeds for highway ramps (professional driver, closed course, do not attempt at home).  Every time I think about getting a new car, those thoughts are blown away when I drove home.  To top it all off, it's practical-4 doors, trunk space, decent rear legroom.  This is the most fun you can have in an automobile, probably for around $10k these days.