If you guys think 702Hp is too much then you must not be a real car guy. Poser =).

I'm sure tunners can make the M5 and Mercedes have the same power but don't both won't be able to put all the power down like the Audi because of it's all wheel drive system.

The more power you feed the cars the harder it will be to put all that power down with street tires. This is where advantage goes to the AWD system (Quattro).