HD Video Editing Powerhouse

I am building a new system and would love to get everyone's feedback on the components I have chosen. I am especially interested in thoughts on the motherboard. I'm also specifically interested in thoughts on where bottlenecks might be. Some notes:

- I will be mainly using this for editing video shot on a AVCHD video camera, using the highest quality HD setting.
- I am planning on watching TV on a dual monitor set up while I'm working on the primary display. I want to make sure my vid card will support watching TV while editing video.
- I am not a big PC gamer, however if something comes out that catches my eye I want this system to support that too.
- I have an existing network attached Raid 1 configured drive (500GB) for archiving my videos. I will only use the hard disk on board this rig for works in progress. I also have an existing 250 GB IDE drive that I will use in this system for a little more onboard storage.
- My budget is $1800, but I would be willing to go as high as $2000 if I need to
- Great sound is not hugely important to me. As long as it doesn't hiss or generally sound crappy I am fine.

http://secure.newegg.com/WishList/ [...] itle=Video

Thanks in advance!