As far as cases go I've got the silver version of this:



I do wish this version had been available when I bought the other one. It's PSU'less so I bought an Enermax twin fan quiet PSU which even with two case fans is still whisper quiet. BTW, the illuminated fan at the front is visible through the grill, which looks cool.

As for CPU and mobo, Athlon XP2000 chips can be had for peanuts and following on from another thread do you really need oodles of processing power for a server? I've had ASUS mobos for a few years now and never had a problem.