Cable management of the 900 is difficult, but there are a few people on here who've done it well. There's even some people who've managed to fit watercooling in it!
I wen't for the P182 over the 900 just for noise and cable management, and i'm happy. Plus it knocked 15 deg off my temps from my Akasa Zen I had before.
Advice with cable management is, plan everything BEFORE you start, and make sure you have a lot of cable ties handy, preferably in a colour of your choice!
Do you have a modular PSU?