Those cars are both much of a muchness other than colour - personally I'd go for the later and lower mileage car given the relatively small price delta.
I looked quite hard at an M3 before I ordered my C63 and there seem to be two big spec issues which most buyers consider:
1 - DCT or manual
2 - Standard 18" or optional 19" wheels
I drove a couple of permutations and would say the DCT box is fantastic, definitely my choice if I was looking.
The car on 18s rides much between than on 19s but virtually everybody orders 19s for the visuals.
Good luck with your hunt.
Last edited by RSK; 27-08-12 at 11:41.