Infiniti has just unveiled the latest generation of its M cars at the swanky SLS Hotel in Beverly Hills, CA. The M will be offered as both an M37 and M56, with both models being either RWD or AWD. Like the G37, the M37 is powered by a 3.7-liter V6 engine with 270 ft-lbs of torque. As for the M56, it gets a massive 5.6-liter mill with an impressive 420-hp and 417 ft-lbs of torque. In total, the new top-level M gets 95-hp and 81 ft-lbs of torque over its predecessor, the M45.