My main rig is a Custom Build based off EVGA's SR-2 Classified, dual intel l5520s, 48 gig ram, Radeon 6950 flashed to a 6970, Crucial m4 SSD boot drive and ~3 tb sata drives for misc storage. As far as the rest of the setup goes, I got one of the Korean 27 in 2560x1440 panels along with a few old monitors set up on the side. CMStorm QuickFire Rapid keyboard with the cherry mx blues and a Logitech g700 for the mouse. Love this keyboard / mouse combo.
Im much more on the sysadmin side of things though, and at any given time I could have upwards of 10 vms running, including esx vms with more nested underneath.
Beyond that, I have an asus g53 laptop, 4x Rackable 2u servers with dual quadcore xeons and 16 gb ram each and an MSA 1500 SAN in the lab.