I'm looking to upgrade my ancient PC (K62 300) to something a bit better. I'm looking at an AMD 1800 XP processor a new case and an abit or asus motherboard and 512 mb of ram along with a gainward geforce 3 or 4 videocard. Could anyone give me advice on what type of mobo/ram/cpu/case combo would be good. I am on a budget of around 600 dollars. Any ideas?