I personally think the car looks perfect. As for the M3 writing on the fenders......maybe take them off and try to get a custom 335i sticker made for that spot. I know Cris at M Fest makes custom side badges, he makes the "///M" different colors for ppl. So I'm sure if you ask he can get you one made saying 335.
2011 Alpine White E92 335i M-Sport N55 Engine