That is a good suggestion, only thing going against it is it being 2 seater only.
Yes but you do get circa 500bhp (and the ability to waste RS4's) and way better than a TTRS through the twisties.
A TT isn't a 2+2 it's a 2+1 (lying down)
Supercharged or turbocharged M3 (old shape) would have plenty of punch and the CS / CSl versions handle very well if the road test reports are to be believed