It's exactly the same thing you posted for the C63 combi. Doesn't look convincing at all over there either.
It's because both cars are not real and made with computers.

Melbourne Red for the coupé, graphite for the sedan.

I choose Jerez Black cause my BMW is also in black(Diamond Black,to be exact) and I think it would be a best choice for this car..with red leather interior as a must option .

is this from the configuration? looks very edgy.
or did you just copy and paste M3 parts from the configuration and paste them onto the e90 sedan?

either way, Alpine White anyday. Then SG

I'm a sucker for Blue cars, but Graphite would be my second choice and then white.

+1 and please add to that beige the black piano wood.

I'd have something similiar but with jade grey leather. Blue cars and grey interiors do it for me.

But in this case, probably go with SSII

Voted for red, that hot machine should must wear some hot clothing ...!

SilverStone. This car looks like a silver lining in the distance and when it zooms past, and it leaves you stone cold (if you lose to it).