Err I think that a tuned N54 335i sounds nicer than this so-called M3! Seriously.
It does look very rapid but that isn't everything when I shop at this price point.
I suspect Benz's offering in the form of the all new C63 will be competitive. It is rumoured to have a newly designed, bespoke V8 TT that is both lighter and more economical than the outgoing NA 6.2 V8. I am sure it will sound a LOT better than than the M3 too.
We shall see....