I wouldn't bash the M5 for being the top performance sedan out there. If BMW wanted it to be an all out sports car...it would have a 7-speed manual.
and the button to put it in it's aggressive mode (m-drive) is on the steering wheel...you push it and there you go...it's not exactly fiddling. For launching you push either the same button or one right next to it...push the gas to the floor...and the computer revs it to it's optimum launch...and you're off like a rocket. BMW's all new transmission is also i believe the fastest 'paddle shift' trans out there.
Another thing that's cool...is it has the capability to basically design your own ecu/fuel management system or whatever you want to call it. Props for a 2 ton 4 door boat that can haul ass...rev a v-10 as high as our 4-bangers...plus have a ton of totally trick features.