Components
Hey, I build computers for a living and here's my advice: Decide what processor to get, then find the motherboard to match. Good motherboards are: Asus, Abit, Biostar, SOYO.
With processors it's a jungle out there. For instance, there are 6 different Pentium 600 processors out there in different flavors! Try to peice together a 133 MHz system, starting with the processor.
With hard drives, go for the drive with the 5 year warranty - IBM, or others if they can match. But get the ATA-66 or ATA-100 drives! The more cache on the drive the better.
Video Cards - If you really don't need anything fancy, no 3D gaming or anything, the ATI XPERT 98's are good and will only run you about 35 bucks. The XPERT 99's are unreliable in my opinion. If you want to spend about 75 bucks on a better video card, look at a NVIDIA TNT2 card by Guillimot or others, but dont get a generic TNT2 card or you may be in for trouble.
For the best prices on stuff, go to
http://www.pricewatch.com.
Good Luck!