If you got a thing for blue LED's, you can always buy new case fans for any case...
To be honest, The only reason why i dont like the 900, is that its short on space. the 1200 looks too short aswell...
Its got awesome specs, but i wouldnt pay that much for a case...
I prefer the coolermaster Centurion 590... Its got lots of space, and lots of fan slots... and you can get more blue LEDs infront of the case... (with an HDD cage...)
But, if you good at hiding cables and you got $180 to blow, the 1200 will be awesome.