Just bought a p183 and I am quite happy going from coolermaster cosmos S since its a bit smaller and a little more quiet (included fans make low-tone noise, very annoying but easily fixed)
Of course you want people to buy Antec PSU with the chassis however I really think you should have a vent for standard PSU which sucks air from the bottom rather than your own PSU that takes air from the front. I got a corsair 1000W and its working just fine simply because I am not using more than 40% of the max performance but I really think there should be an opening for airflow and a mesh as well in the bottom of the chassis.
I can imagine alot of people with standard lower Watt PSU not switching to antec since they wouldnt get the proper airflow and cant be bothered to sell theirs just to buy a new antec PSU so I really think you would benefit by open it up for standard PSU.
Otherwise great chassi I love it!
