Cyber Monday (Which is this Monday), has better deals then Black Friday for online shopping.
Dell, HP, iBuyPower, CyberPowerPC, as well as TigerDirect, and Newegg will be having many deals starting on Monday, and I think releasing the specials tomorrow.
http://www.ibuypower.com/ - is a great example, as you can see the deals they're currently displaying, which are about $200 less than if you buy them on Tuesday. (Look at the specials at the bottom as well).
I bought my computer at Best Buy for $300. It was an open box / display model that they werent going to use anymore. Of course they reformatted it before they gave it to me. 3 years later its still running strong.