If you could choose between.
1. Processor:
AMD Office computers, Gaming Rigs
Intel Video Editing
2. Videocard:
Nvidia If all I played was AH2
ATI everything else
The manufacturer is not critical the chipset is.
3. Mainboard. Abit
I have both Abit and ASUS boards and prefer the Abits, 875/865 Intel chipset orNForce chipset for AMD
There is big diffrence in mainboards.
4. Ram. Corsair dual channel DDR kits- Value Series for office computers, TwinX low latency for gaming rigs. Manufacturer is not as important as latency. Other good Manufacturers include Mushkin and OCZ
Intel's 925XE chipset may cause me to change recommendations in the future. 4.0 GHz on a 1066 MHz FSB w/DDR2-667 ram may prove to be very potent, but it will also be very pricey to begin with.