Be free to flame me ... but I like a green theme:
- AeroCool X-Predator Green edition (has a transparent window)
- 2 Green neons inside
- one extra green-lit led 12cm fan in the back.
Combined with a greenish theme for my Eclipse PDT (I do programming), the entire thing looks extremely Geeky ^^
Logan832, I would replace the two red fans on the HAF 912 and get rid of the crappy expensive rubber key MS keyboard (sell it), get a nice mechanical keyboard instead (something with Cherry MX Black), and setup everything else on the blue color.
Good luck !