I'm considering of getting something more... Phenom II friendly...
ECS KA3-MVP Xpress 3200 (PCIe x16 CrossFire on both lanes, first generation). Held my 5600+ at 3.2Ghz for a year (228x14), no Phenom support, would be good for folding I guess.
4x1Gb Wintec Amp-X DDR2 800 5-5-5-15. Runs at 900MHz with stock timings and voltage (1.8V)