@RC

go for the E63s, it's the better car for your needs and according to one of the latest Sport Auto issues that car was just mind blowing @Supertest!!

Christian Gebhardt was totally in love with it, the performance was just incredible, not only in straight line but as well in Nbrg and Hockenheimring:

"...Er brauchte lediglich 7:45,19 Minuten, um den über 2100 kg schweren, schwäbischen Pampersbomber über die 20,83 km der Nordschleife zu pilotieren. Das ist sogar schneller als ein Porsche 997 GT3 RS, der mit 7:48min über zweiSekunden langsamer ist...."

Link  http://www.evocars-magazin.de/2017/11/24/mercedes-e63-s-amg-t-modell-schnellster-kombi-am-ring/

His final comment about that car was that if money wouldn't be an issue he''d buy two E63s, one for the road and another one without all luxury gadgets, only one race seat, windows made of macrolon,...