CM690 case
5x Arctic F12 PWMs all tied into the CPU fan PWM for quiet idling + Scythe Slip Stream 120 PWM on a XigmaTek Gaia heatsink for the CPU
i5-2500K @ 4.5, 1.250v
Gigabyte Z68A-D3-B3 (no Quick Sync for me
boo... Although I'd continue to use use x264 anyway :p)
8GB 1600C9
XFX non-reference cooler HD 5870
X-Fi XtremeMusic with the OPAMPs swapped for LM4562
Many, many hard drives arranged in a haphazard manner
OCZ StealthXStream 600W PSU (my Hiper 580 finally gave out after 5 years of continuous abuse. My Tagan 800W died within a year - although it was powering two 9800GX2s for a large portion of that...)
2x colour-calibrated 24" S-PVA LCDs (yeah, I know I should be using IPS for colour-critical work but I do have budgetary limitations
)
Usually runs Win7. Can be spotted in Mac OS when doing graphical work or when Windows does my noggin in. Can also be spotted running Ubuntu when I'm compiling Android
Simples. Plus, it's nearly silent at idle. It would be if it weren't for that pesky PSU fan.