vMax :
I prefer the P7 Silent even without the window as it has a more modern clean layout inside. Looks easy to build in with a PSU cover running along the bottom nicer look...In terms of airflow, both look similar..
Yes the P7 Silent definitely has a more modern clean layout inside, however from what I read the VSP-5000 has a better air flow(I guess because it has 2 additional fans on top) and I think a better cable management behind the motherboard as a result of the raised section of the side panels.
Also the VSP-5000 has 3 fan controllers on the front panel while the P7 Silent doesn't have any.
Still prefer the P7 Silent?