Nothing that some minutes and Dremel/similar won't solve:Presume cable routing in them isn't a problem? It seems notably good with the P182.
http://www.nordichardware.com/skrivelser_img/532/A71_19.jpg
http://www.nordichardware.com/skrivelser_img/532/A71_20.jpg
HDD cage has actually bigger holes for airflow in cases made later. (reviewed case looks like original/oldest revision)
I can take tomorrow pics from what my fifth of May assembled case looks from inside. (haven't yet started covering every free spot by BeQuiet combination mat)
Fans coming with case are quite good for apparently ball bearing (also model code hints to that) fans, but not on top (just like Antec tri-cools are just OK) when it comes to noise.
I got myself 1200rpm Scythe Slip Streams (Kaze Jyuni) for replacing them. 800rpm model would be pretty much quiet without fan controller:
http://www.silentpcreview.com/article832-page3.html#SS-M