My computer set up for the past 2 years has not changed, and is:
AMD 64 3200+, 2Gb DDR, Asus K8N-E Del, Primary HD 80Gb Western Digital, Slave HD 160Gb Western Digtal (model number WD1600JD).
I use my primary harddrive for windows, and the slave for my documents (currently about 60gb worth...