but... are you sure your going to have time for video editing?
... on the up side, you'll have plenty to do while your video is encoding. :bigsmile:
Back on topic:
Athlon 64 is definatley the way to go with your budget. The Corsair ValueSelect memory listed above is also your best choice as far as memory goes. The 1GB Dual pack (2x512) should be more than enough. I just got the dual pack from newegg to replace my old memory (one Crucial stick failed).
As for a case, the following one is quite nice:
Antec SLK3700AMB. It should also available in black/grey. You might want to upgrade the Power Supply (depends what kind of accessories/number of HD & optical drives you will add.)
What ever case you get, I would recommend adding a fan or two. (Intake or exhaust.) Also, do not forget Thermal Grease for attatching the processor and heatsink. Arctec Silver brand is widely regarded as the best.
Don't forget Cables! Additional IDE, SATA, Floppy, SPDIF (CD/DVD to Sound Card/Motherboard), and Power Adapter (for SATA, or additional Case Fans). Some of these may be provided with other hardware (motherboard, soundcard), but best be sure you get everything you need to avoid any hassles. I would also recommend getting a hard drive cooler (most modern drives get quite hot), not to mention video editing is very disk intensive. I have a few of the following: Bay Cooler. Not cheap, but they last a long time. Mine have been running for over 5 years now (almost continuously). They do produce a fair bit of "white noise."
You probably have a keyboard/monitor/mouse to use as well, but I thought I would remind you none the less.