I have to advise agasint the 900. Look at the rear. Cheap cases forgo a place to mount a rear fan and this case is an example. If you modified it somehow the biggest fan you'd be able to put would be a 60 mm. Not good.
The 1000, however looks very much simmilar to lian li pc60 I have and should be worth considering.
If the front USB and firewire ports are extensions to connect internally and not externally, it'd be even more sweet.
However the price is then decent and not so hot, for 30 bux more, you can get a pc-60 and the quality that made the lian so popular. speed adjustable fans in front for one.