Little update here... though MSI's website (which seems to be having problems with their product pages at the moment) said the K7N2 has an S3 video processor, I found a good review at FiringSquad hardware that shows it with a GeForce4 MX chip (which makes more since, with an nVidia chipset). Much better option (though still a little slow for high end games). BTW, the video onboard is actually an option on that line of boards, so if you do decide on it, MAKE SURE the one you order has it. I think the model with the onboard video may sport a "G" after the model number, like K7N2G Delta ILSR.
As for the memory slots being different colors, I believe one is for 128-bit DDR Channel, and the other two are regular 64-bit DDR slots. Not sure about the memory density bit. My advice would be to go with MSI's recommended memory manufacturers, Kingston, Corsair, and Crucial. I don't have any experience with Corsair's memory, but from what I've read some of their high-end stuff is very fast. I've used Kingston and Crucial memory, and their stuff is very very stable. I've got 512MB of Crucial DDR PC 2100 in my AthlonXP 2000+ box now, and I've never had to worry about a memory problem (which I've had many of in previous systems, since I bought cheapie no name memory from local computer stores and shows). You'll pay a little bit more for them over the cheap stuff (though Crucial's prices are usually not too bad), but I think its worth it.
