I never really thought the 135 looked that great. So my vote goes to the E46 M3. It looks beautiful, and it performs awesome on the track. Also having a stratospheric redline makes things fun.
Understeer is when you hit the wall with the front of the car and oversteer is when you hit the wall with the rear of the car. Horsepower is how fast you hit the wall, torque is how far you take the wall with you."