Isnt the nForce4 supposed to have PCIe (at least 32 lanes of it...) - and thats rumored to be coming out in december.
Ok... my 2cp:
I would wait until december to get a new computer. But, heres what I would reccomend if you were to buy at this very moment.
Processor: If you are decking your system out with this kinda stuff, get an Athlon64 FX53...
Mobo: As posted
Memory: 1GB should be plenty for now, but 2GB is still nice to have - I'd reccommend either 2 or 4x512 Crucial Ballistix depending on 1GB or 2GB
Case: As posted. (Hell, if you can spare a few more hundred dollars, buy an nventiv mach2 case - overclocking is good on that thing...)
Floppy: Port your old Floppy from your old computer over, if you are not going to use it anymore - saves you some money
Hard Drive - RAID-1 2x DiamondMAX 10 Maxtor HDDs (300GB, 16MB Cache, 7200RPM) - quiter, cooler than Raptor 10ks; sometimes faster than Raptors too...
Optical Drives - As posted
Video Card: As XT and Ultra versions of X800 and 6800 are not out yet for AGP, Gainward Ultra/2400 256MB (6800 GT(350MhzCore/1GHzMem with factory covered warrenty overclock to 6800 Ultra (400MhzCore/1.1GHzMem) speeds) for the price of a GT
Monitor: CRT monitors will be better for gaming than a lcd - but, unless you are a huge powergamer, you will not notice the difference. Also, unless you need the monitor to take up only a little amount of space on your desk, the CRT is much more price effective.
Sound: Onboard sound solutions have made huge progress, and unless you are going to be watching movies on this computer and have really good ears, you probably wont notice the difference between Audigy2 and ENVY audio. But, with the speaker system you are planning to get, you will need to move to an Audigy2 Platinum Retail for 7.1 speaker setup - Audigy2 ZS only supports 6.1 channels.
Speakers: I'm not incredibly stingy when it comes to sound quality - other than MP3 128Kbps vs Ogg quality 3. However, if you are the guy who likes to fork out money, get the soundsystem.
Ethernet: as posted
Hub: As posted
Keyboard/Mouse: If you are a serious gamer, you will want to stay with a corded keyboard and ballmouse - or optical mouse, as those offer faster response times.
(I think this setup is a little less expensive than what you originally posted - depending on what way you go with the components suggested)
Maxtor DiamondMAX 10 vs WD Raptor 10k - http://www.gamepc.com/labs/view_cont...ndmax10&page=1
Gainward Ultra/2400 Golden Sample -http://www.gamepc.com/labs/view_cont...w6800gt&page=1
Crucial Ballistix -http://www.anandtech.com/memory/showdoc.aspx?i=2145&p=9