Yea I know...When I first saw it I was like SWEET...with all four tires spinning!
But once I enlarged it I could see it was photoshoped.

I think it would be a hard choice to make between an M3 and a S4.
On one hand you have quality performance and tuning from the M3, on the other you have a Twin Turbo which takes well to mods. With minor mods you could up the S4's Hp&tq quite a bit.
I would think with the M3 there wouldn't be much more you could do other than maybe some sort of induction. I think everything stock is pretty much as good as it gets. Not sure thought, can anyone add?
Later,
Justin