DaFish - we are thinking alike. We have the same performance mods on our 335. I was contemplating the same thing as you (M3+blower or GTR or 911T or ...) about 6 months ago and decided on the M3. Picked up the Akra and catless mid pipe already and am looking at an ESS VT2 600 kit right now...and my M3 should be here any day now (ordered a 2013).
I did actually race biglare in my 335 in a roll-on event and that thing is wicked! Would be terrific to see that car go to someone like you.