Here is my work machine that I built. The case is a coolermaster centurion. The case features a completely perforated front with filter material behind all of the perforations. It really helps keep the dust down. The specs are:
Athlon64 3000+ Winnie @ 2.0 GHz
DFI Lan Party Ultra (n-force 4)
1 Gig Crucial PC3200 (dual channel)
Radeon x300 PCI-x
74 Gig Raptor
Lite-On Combo Drive
Coolermaster Centurion Case
Coolermaster 450W Real Power PSU
And here is my home machine. The hardware is dated, but 2 1/2 years ago it was 1337.
AthlonXP 2100 @ 2.2 (200 x 11)
512 MB Corsair Platinum Low Latency (dual channel)
Asus A7N8X Deluxe
Asus Radeon 9600XT 128MB
Two 80 Gig WD Special Editions in RAID 0 (SATA)
425w Enermax Modded with stainless braiding on all cables
6 80mm LED fans
Aluminum (Chieftec?) window case
Vantec Fan Bus
Two Cold Cathodes