I'm totaly indecisive on an M6
(repost of my post on roadfly e90 M3 forum)
I was offered a lease deal on an M6 that is almost the same as for the M3. Maybe $100 more per month. White with Sepang, SMG, all options, list of $111k. $10k off sticker and a very generous trade in allowance bring the lease payment close to what I'll expect for the 2009 M3 sedan I have on order.
This is not as easy a decision as you might think. I don't like the idea of being seen in an M6. It's not really my style. The car is configured just as I would configure it (except for CF trim), however, and it's here now instead of late October. It's going to be a daily driver, in one of the heaviest snow (and salt) areas in the country. But since it's a lease, I don't mind as much. Also, the M6 up front mileage costs are the same as the M3 (15 cents/mile) so my high mileage (~24k/yr) is partially subsidized.
I hate it when other people ask on these boards if they should buy a particular car, because everyones opinion/tastes are different, but I'm truly torn on this one.