Because of the planned Intel price cuts for the Q6600's I am seriously considering replacing my three Dell 3200 P4 machines with new Q6600's with builds very similar to CougTek's build without the x1950's.
Based on this, my recommendation would be the following :
Intel Core 2 Quad Q6600 (4x 2.4GHz) LGA775
Thermalright Ultra 120 eXtreme heatsink
Scythe S-FLEX SSF21E (mod to 7V) or similar
Gigabyte GA-965P-DS3 (solid capacitors, lacks Firewire, if it's important to you)
2GB DDR2 667MHZ, or 1066MHz if you plan to overclock. 667MHz is almost half the price.
Sapphire Radeon X1950 Pro 512MB PCI-E (X1950XT doesn't increase FAH production, I know : I own both)
500GB hard drive, because it's cheap. 250GB if you want to cut corners.
Pioneer SATA 18X DVD burner
There's absolutely nothing wrong with the Dell machines. They do their necessary function. The cost to folding performance ratio's are just too great for me to ignore: They will be cheaper to operate and produce aprox. 14x more (around 3,200PPD each vs 220PPD) I may wait till AMD comes out with their quad processor, just to see how that performs before choosing.
I find it ironic that Coug asks about the freefall in RAM prices when what I've noticed is the continued freefall in CPU prices. I rather expected the DDR2 RAM prices to drop when AMD went DDR2 because of the ecconomies of scale that occur when world wide RAM production was no longer split between DDR and DDR2. It took a while, but I'm sure that is the real cause for the RAM price fall. But I'm somewhat surprised that Intel is still dropping CPU prices, rather than trying to take a bit of profit to keep short-term investors happy. Offhand, I feel Intel wants to outright bankrupt AMD first: In the long run very bad for the consumer but very good for Intel ...