I beg to differ. My opinion is that people want the best of both worlds. Buttery smooth power delivery is what true luxury sport sedans offer. An M5 is more harsh than most, but the majority are super smooth and powerful. Just look at the examples from MB, Audi, Jaguar,
Cadillac, etc. The M5 IS the M5, nothing else like it. People who want that harshness buy an M5. I bought a XFR, which at the time I bought it had the same HP and more torque than an M5. But the deciding factor was the NVH and the shift programming. here was nothing smooth about the V10 version of the M5; stiff suspension, harsh shifting, too loud, super super complicated electronics, too much steering for city driving, but it was a super track day car. As you know, they have dialed down all those attributes in their newest version.
At $80K or more we want both. But at under $50K you don;t get a complete version of either. The Genesis models are by no means sport sedans, not even close. They are luxury sedans, and the R-Spec offers some sportiness. I don't want to sound like I'm berating you in any way, however I might suggest you try other sport sedans to see what they are like. Even the
Infiniti models are much more sporty than the Genesis, especially when it comes to going around a corner. I can literally take a cloverleaf at twice the speed in my wife's stock WRX than I can in my brand new 2014 R-Spec. That is not sporty at all.