Door on the front and top mounted PSU broke it for me. I ended up with a 690.
Yeah those bugs me aswell. Before I was thinking to get the antec 1200 it was on sale on microcenter but I hold up I dont know why. About the antec 900, does it have a good air circulation and cable management? I'm sticking a 4870 x2 and i'm gonna oc my e8500.