Building A New Computer, Parts List And Recommendation Needed?

Hi everyone. What I want to do is I want to compare some of the best cpu’s and motherboards out there. I want to build two new computers, and the only difference will be the motherboard, cpu and memory. Right now, money is not a limitation, although I would like to keep the cost down to $1500 or less per computer.
I would like for you to recommend to me your best recommendations on the individual components needed. I would like you to recommend the following parts for two computers, one an Intel computer based on the new Sandy Bridge CPU’s and the second one an AMD based computer based on either the AMD II X4 975 cpu or an AMD X6 1100T. So I want a motherboard and cpu combo for each and at least 8 Gigs of Low CAS Latency RAM, up to 12 Gigs of Low CAS Latency. I want the rest of the gear the same. Figure in your estimate, an OEM copy of Windows 7 Ultimate Edition.
List one or two compatible motherboards for each CPU type and explain why you chose that motherboard. This is a very important component, and I want the top motherboard component for each cpu…I prefer you limit it to ASUS, Gigabyte or MSI. Don’t recommend other manufacturers please.
The rest of the gear will consist of:
1). One video Card, either nVidia or ATI, please explain which card and why you chose it. Which model? I do not want to Crossfire or SLI the computer.
2). At least a 2T hard disk for each computer, which brand and model
3). A DVD Read/Writer, give me your recommendation on which brand and model
4). An excellent power supply, preferably 850 Watts or above (yes, please, 850 or above)
5). An excellent case with known excellent air cooling, keep the cost under $150
6). A good air cooling cpu/heatsink unit. No, I do not want water cooling.
I also want your recommendation on a good antivirus security suite. Which one do you recommend? I will be using the same suite on both computers to make them as equal as possible.
If I left anything out, please let me know. Please use Newegg as your cost reference and page URL references. Do not use any other source for parts, as I use Newegg exclusively.
Thank you for the help