Mine isn't spectacular but it has to be nice since I use it in my living room

Intel Core2 Quad Q8400 @ 3.7Ghz
Arctic Cooling Freezer 13 CPU Cooler
8GB Crucial Ballistix @1066Mhz OC'ed to 1200Mhz
ASUS P5Q Pro Turbo motherboard
2x Radeon HD 5830's crossfired overclocked GPUs @975Mhz Mem @350Mhz
CoolerMaster CM690 Case w/ 6 Fans and soundproofing foam panels
Thermaltake 750W modular PSU
Scythe fan controller
Raid 0 with 3x Spinpoint F4's (320GB*3=960GB)
250GB Spinpoint F4
1TB External eSATA

Get between 510-590Mh/s depending on my settings at the time.

GPU temps 66-69*C

CPU Temp 40*C

Very nice and quiet, even with all my fans maxed.

http://farm7.static.flickr.com/6029/5918117144_d7bba15e26_z.jpg

http://farm7.static.flickr.com/6003/5918118200_dc752c771c_z.jpg

http://farm7.static.flickr.com/6132/5917556621_0c7d373e23_z.jpg

Still need to work on my cable management a bit more:
http://farm7.static.flickr.com/6141/5918121056_ac54de627c_z.jpg

http://farm7.static.flickr.com/6143/5918122770_7a8be18a2a_z.jpg

And my 52" Monitor

http://farm7.static.flickr.com/6133/5917559635_56da129ca8_z.jpg