I don't really get the "this thread is stupid" "what a bunch of fanboys" jab.
The CTS-V is probably a fine car but its still a GM product. Does that escape anyone? GM always manages to bungle great vehicles with poor interiors.
It costs less than an M5 for a reason. And that reason isn't just a brand name.
It's much like my GTR. It's a great car that can definitely run with the big boys but it's less expensive than a 997 Turbo because fit and finish weren't high on Nissans priority list. My guess is that's what GM has done with this.