Honestly, I find it amusing that anyone would drag race an M3. That is clearly not where this car excels. The beauty of the M3 is in its supreme balance, dynamics and sujective feel. While certainly not slow, drag racing the M3 and getting thrilled about the fact that it can "beat" something else is a bit of a joke. There is a long list of cars stock and modded that will "beat" an M3.
IMO, there are only a handful of stock non-exotics worth bragging about in this regard. Z06 or ZR1 vette, Viper, GTR, 911 Turbo. One could even agrue that the 911 turbo is bordering on exotic.
Really, if you want the biggest "drag dick" around, get a GTR and just get a reflash. You'll be running 10's all day long. Everyone else should just keep quiet.
Audi S6 * Audi S3 * Porsche Cayman GTS
--Former BMW M3 owner