fast doesnt complete my thought. think of horsepower or 1/4 mile times.
do you want to beat up on ricers and run low 13s/high 12s? do you want to blow the doors off corvettes? where do you want to be in this situation?
either way transmission work is pretty necessary after driving at that power level since youll toast clutches/torque converters/etc. your stock tranny will last a while, but youll blow it up quicker if you drive like a douche.