let's see, I can't say I'm a heavy gamer myself, but I have a setup that every gamer would drool for...
I have all the consoles (one Wii - WODE, two Xbox360 - FW patched, two PS3 - Jailbroken, PSP1000 - CFW, PSP2000 - CFW), all connected to a 50" :p
And I have two setup (one in each continent) of Core i7 975, triple monitor setup with a XFX 5970 BE, fully armed 12GB DDR3-2000, 2 x 120GB OCZ SSD RAID-0
Gaming on them is just my 2nd option, my primary task for them is EROGE (I have 5 x 32GB MS Stick Duo, full load bishoujo geimu for my PSP :p), 16TB storage server to store eroge), Triple monitor setup so I can play/watch juicy pic while I work~
All eroge are on a virtualized setup, Japanese OS, +9 GMT, so it won't mess up my rig either :p but I'm running out of 12GB RAM, gotta upgrade it to 24GB later in 2011 >.>
And may be a 40TB server soon in early 2011, I ran out of space for my 16TB server >.>, Two of them actually, one in each continent ^^