I'm on two Frankenstein-like desktops pieced together from freshly purchased motherboards, DRAMs, graphic cards and CPUs, and the rest looted from my well fed electronic junkyard.
In a nutshell:
MB: ASROCK Z77 - ASROCK Z68
CPU: Intel Core i5 3470 3.2GHz quad core - Intel Core i5 2500K 3.3GHz quad core
DRAM: 4GB DDR3 dual channel 666 MHz - 16GB DDR3 dual channel 665 MHz
GRAPH: 1023MB NVIDIA GeForce GTX 560 Ti - 1023MB NVIDIA GeForce GTX 560 (point of view)
DISPLAY: 2 x SAMSUNG 1920x1200 pixel, 1 shared
HDD: 1x500GB mounted, 2x1TB external - 1x500GB mounted, 6x1TB external
KVM switch to share keyboard, mouse and one monitor between the systems.
Had to ask speccy, for in the other room the old girl has a similar (but not identical) arrangement and thus I tend to forget what is where and which is which...