Viceroy said:The M5 seems like the ultimate sports sedan. I test drove the M5 and I must say that I was very impressed. I am trying to decide between the M5 and Audi S8.
If you're thinking Audi, then you're speaking my language. I would forget the S8 and try for an RS6. It's a direct competitor to the M5 as far as price and performance. Problem is they are very rare in the states. I think you'll find a better overall driving experience in the RS6 over an M5, but the M5 looks a little better in my opinion.
http://www.audiworld.com/model/rs6.html