I currently have a Quad Core Q6600, 8GB DDR2 RAM, 8800 GTS 640MB (PCI-E), 2 DVD Burners (SATA), single SATA HDD (Possible upgrade to a 2nd), TV Tuner Card (PCI-E), Aircard (PCI).
I use both DVI slots on the 8800 GTS to power Dual 24" LCDs.
The PSU I had in it went out to lunch, and locally...