I've been folding since late April 2012. My two rigs are as follows: first on is a core i5 with 8gb ram and dual 460's in sli. The two 460's will be water cooled in the near future. The second is a core i7 with 16gb ram and dual 448 FTW's. The future plan will be to water cool the 448's as well. Just need time and money - when I have one I'm missing the other! LOL!
The core i5 rig folds 99% of the time. The core i7 rig folds when I'm not gaming.