Being nosey that I am,
What else do you use your PC's for?
Great score by the way
Im into gaming quite a bit sometimes up to 80 hours a week.
I have also been having a lot of fun benching things lately.
The reason for my different PCs is CIV 5, I play it on a huge map and find late in the game it is very demanding on hardware.
When Civ 5 came out I was playing it on an i7 975/HD5970s and found I could get just over half way through a game before it was too much for the hardware.
Then I upgraded to a i7 980/GTX 590s and found I could get 3/4 the way through a game before problems.
Finally I got to my i7 3960x/GTX 690s and found I could just about finish a game.
On extreme settings Civ 5 is an absolute ******** and a bit of an embarrassment for the game devs.
One game I am really looking froward to is RTW 2.