If you want a cheap yet good computer
AMD 64 3000+ Processor
NForce 3 Mobo
nVidia FX5700 or 5900 or if your looking for ATI a 9800
(If you want to play games this should get you through but if you want to play with some high quality get a 6600GT, they are pretty cheap now anyway)
1gb of Value Select Corsair, Kingston, Mushkin. These are cheaper but still good. The only downfall is that they are not for overclocking.
80-120GB SATA or IDE hard drive (Seagate's are good in my experience)
case/powersupply : http://www.newegg.com/app/ViewProduc...119-065&depa=1
cooler master makes good cases,
this one is nice and comes with a 350W ps which should be enough...
If I have time later ill find the links and stuff but they should probably be easy to find on your own
I built a computer resembling this one and it works great...
it should cost you anywhere between 650-900$ i suppose..I have no idea about american currencies