This is pretty much what made me want to go the IS F way.I had my eyes set on the M3 but when i test drove it I was disappointed. Torque comes in way late and you need to drive it at high rpm to appreciate. When I tried the ISF, I knew it right away. The smile meter needle was all the way to the right. I bought the very unit I tried. I was simply impressed. For me it's a no brainer.
The BMW V8 can rev higher (shorter stroke) but the torque comes in much later in higher revs, my Stage 2 STi felt faster than that car.
The IS F was just brute force from the get go. Punch it and you're gone.