There is nothing mild about the M6. With a 500-bhp 5.0L V-10 and a 7-speed SMG (Sequential Manual Gearbox), the M6 rips from 0-60 mph in 4.5 seconds on its way to a electronically limited 155-mph top speed. To keep all the power under control, BMW offers three different engine performance settings: P400, P500, and P500 Sport. The SMG has 11 transmission calibrations to handle any driving conditions. The DSC (Dynamic Stability Control) system is tuned to allow more aggressive driving before it intervenes. Exterior upgrades include a unique air dam, rear diffuser, and quad rear tailpipes. With its intimidating combination of power and style, the M6 is without peer. Pricing starts about $110,000 when you add destination charges and a gas-guzzler tax.