I've owned 2 generations of M5's. My current one, the 500HP V10, is a tame daily commuter with performance dialed down. But press the 'M' button on my steering wheel which is programmed to crank up the gear shifting speed, kick in the full 500 HP and tighten the suspension for race track performance and you get blown away. It's amazing this thing is street legal. Best performance for the money by far if you ignore the Corvette which isn't close to the same league as the M5 in terms of quality, comfort and finish.