Main very-near-silent aircooled PC (but of course, so my Grados don't suffer):
Corsair 620HX PSU (5 year warranty)
Gigabyte MA790GP-UD4H (AMD 790GX chipset, "UltraDurable3", 3 year warranty)
AMD Phenom II X4 940, w/ Thermalright 120 Extreme (True Black, blah blah), "doglips s-clip mod" (google that) to fit AM2 properly
8GB G.SKILL HK series DDR2-800 4-4-4-12 (lifetime warranty)
My "ol' reliable" XFX 8800GT XXX 512MB w/ Thermalright HR-03GT (lifetime warranty)
1GB Samsung HDD
1.5GB Samsung HDD + 1.5GB WD Green HDD on RAID1, main data storage (soon, after I pay $1000 to recover some data in a month)
Rosewill Black Case
Scythe 120mm S-FLEX "D" series fans (800RPM, super quiet, MTBF: 150,000 hours) + custom ducting system for CPU heatsink
X-Fi XtremeGamer w/ PAX 2.15 Drivers
Other stuff:
Samsung 2233rz
120hz 22" monitor - best monitor I've ever used, including CRTs,
for gaming. TN means the colors aren't as accurate, oh well
Win7 x64 w/ Switcher (like expose for mac), GridMove, F.lux (no more sleepless nights), VirtuaWin and Acronis 9 backups
EMU XBoard 49 MIDI Keyboard Controller
Linksys WRT54G-TM w/ Tomato custom firmware (delicious! lol)
Verizon FIOS 20mbit up/down
I had and sold my Intel 160GB X25-M G2 SSD in preparation for when I can actually afford one without living on ramen like a jobless tard (aka now).
It's not particularly impressive anymore, but I've put a huge amount of thought into each and every one of the components. I wouldn't have changed a thing, it's around a year old now, with the 8800GT and the X-Fi being closer to 3 years old. I'm also a sucker for warranties, haha.