Originally Posted by Digital.James
I would say M5.
There are a ton of fast coupes; not to say the M6 is bad in any way. But you're in Porsche territory there (100k+).
The M5 really has no equal in its class. No other sedan in that size comes close to it's performance equal.
ever heard of the the mercedes e63? while i hate the way it looks it it and equal or maybe even better than the m5. most reviews say the e63 is better. so the m5 is not in a league of its own. and the rumored audi rs8 is on the horizon and is supposed to be faster than both. and if you really like/believe the rumors/spy pics then youll also know about the update to the m5(some say twin turbo?). but in the end the m5 gets my vote. i like both but i like the m5 a little more. if it were my money i wouldnt buy either though.