Obiously it's YOUR car, YOUR money, and YOUR time. It would be hypocritical of me, with my RB S30, to decry your decision to modify the E30 M3. I'm just a huge fan of that car (I have a pig poster of the Warsteiner M3 hanging on my wall). To me it's the TRUE M3. Whatever you do... have fun. You can sell it to me if you ever decide to get rid of it.