Im in the same boat as you are, and it just depends on how long you want to wait. I plan to buy some of the stuff on Cyber Monday, as last year, there were good deals to be had on Newegg on that day. Generally, good computer parts dont drop in price after christmas because its really hard to overstock them. Seasonal items are very different though.
If you really want to save money, find a few friends, give them a list of the stuff you need and send them to a few computer stores on black friday. Places like Best Buy, Fry's and especially Circuit City are good for big sales. As LogicSequence pointed out in chat last night, last year he got two very expensive Samsung 22" monitors for 400$ at best buy. Their normal retail price was slightly over 300$.
I suggest that if you know what parts you want, you start buying as soon as you see them for a good price. Last weekend, Fry's had the 1TB HDD i want on sale for 80$ instead of 130$ like normal. Even though my last needed paycheck was still a month away, i went and bought it because I know a price like that will be hard to beat.
Look for leaked Black Friday ads for computer stores online. You may be able to find some of the items you plan to get on sale.
That, and decide whether or not you're really willing to spend the full amount. Because if you arent, maybe you should re-price your config.