I briefly thought about a 1-2 year old M6 instead of an '09 M3. It's a little bigger and heavier than the M3, so IMO it doesn't handle quite as nimbly, but it's still more than capable and it also has more power and straightline speed. It was very comfortable, and I liked the interior a lot.
For me, it came down to two things. Subjectively, the exterior appearance of the car just hasn't grown on me - I like the looks of the M3 coupe much better. Also, as a mid-level associate in a law firm, it says the wrong thing to be driving a nicer car than those of most of the partners. I just don't want to attract that kind of attention. Both of these are strictly personal factors, but I thought I'd share.
2009 Interlagos Blue
2004 Silver Gray
330Ci ZHP (Sold)