Sorry if this was posted before I didnt see it. Sometimes I take CNET's car reviews with a grain of salt, but I do like Brian.
This review was pretty good, spoiler they picked the 7 in the end, basically for many of the reasons that I am most likely getting the new 7 (unless the next version of the 6 Gran Coupe blows me away).
http://www.cnet.com/roadshow/news/sh...es-vs-s-class/
Enjoy.