p180 is a blinder and a real dream to work with too. Lot of thought has been put into it to make each part just right. The original door problem has been solved so that isnt even an issue anymore.
As said above:
The psu is in a seperate chamber with its own dedicated 120mm fan, psu provides a lot of heat to a case so by seperating it you reduce the overall heat of air in the case straight away.
2 X 120mm are located around the area of where the cpu will be located so again keeps it cooler.
The VGA duct can be kept for extra cooling over the gfx card but can also be easily removed if you dont like it.
google it and have a look, mine is silent and and with stock cooling the temps are nice and low
Cant lose with this one, I'm loving mine!