this is where im looking http://www.newegg.com/Store/SubCategory.aspx?SubCategory=14&name=Internal-Hard-Drives i kinda want 250GB+, its going in a older Emachine 2.17GHz / 1GB ram (ya i know ) ive just used the shit out of this harddrive and its time for more space and a fresh drive. so is 7200 worth it? or sould i just get a 5400? im confused what the differances are? how importain is 32mbs cache? any suggestions?