[randomness]

Wether you get the dual core Intel or the Quad depends on your application preferences. Quad is mostly for video editing n stuff. Dual core is more suited for gaming.

For the motherboard, IF you do want to put the cards in SLI you MUST buy a motherboard with an Nforce chipset which supports SLI, NO intel chipsets support SLI, only crossfire.

If you are after an Nforcec chipset, try to get the latest 700 series SLI chipsets, e.g 780SLI.
--- X38 only supports CrossFIRE


Now the power supply must have atleast 2 PCI-e power connectors and spare molex connectors to convert them into a pci-e power connector. Id say the 600W would be enough, although if your going to do some overclocking i suggest you get a higher wattage power supply.

I think everything else is fine, just make sure the cards will fit into the case... 8800GT's are very long