The 2010 BMW M5 is renowned for being powerful and fast. Relatively speaking, however, it's difficult to utilize its full potential on the open road. So unless you plan on the occasional track run, it might not be that fulfilling.
If you're in the market for a high-performance sports sedan that's easier to live with on a daily basis, check out the 2010 Mercedes-Benz E63 AMG. It costs roughly the same as the 2010 BMW M5, but offers seven more horsepower and can accelerate from 0 to 60 mph 0.2 seconds quicker. More importantly, however, test drivers are unanimous in their praise for its handling dynamics.