Hm, I am frankly a little confused here, lot of valuable technical info, but I guess I am missing the background to fully understand it.
Maybe I can ask a simpler question which makes the answer a little more comprehensible to me.
One of the funnest car I ever remember driving was a 1978 320i when I was a student. I remember the first time I sat behind the wheel I was completely taken over by the feel of that car. It had such a sense of urgency that it felt it
wanted to go and it was always going to slip from under me. I am not sure what this quality needs to be attributed to. Was that the high reving concept or was this a torqy car for its time?
I recently test drove the E39 M5 and though it's low end torque was mesmerizing it did not feel like that old 320i , it was more civil and controllable.
I just want to get that feel back again and I am not sure which car is going to provide it.
Hope I making some marginal sense