I recently purchased and returned and Antec Nine Hundred.
The unit looks great, very cool (in all sense's of the word) and industrial, however i was disappointed by the overall quality. The side panels are very thin, so much so that when removing the windowed panel for the first time the the metal tab on the back of the case bent!
The optical drives have to be hard mounted to the case, with no dampening at all. I dont like thhe fact that there is no rail system. The hard drive are also mounted metal on metal to the cages...again just a cheap impression compared to my older Sonata.
The psu mounts on the bottom of the chassis, but there are few places to hide wires and such. I was saddened to see the apparent lack of QC from Antec, but upon reading other boards this seems to be an issue not only with this case but PSU's too.