Hey wassup everyone here @ Techpowerup.. im really into building my own pc and thought this would be one of the best places to learn alot more than i already know. neways i was wondering, i wanted to have more than one HDD. I was hoping to have one HDD to hold all of my mp3's (about 30GB) then to have a HDD only to install any pc games that i have (i dont have much ... yet), then a general HDD for all other programs like my Photoshop 7, microsoft office... etc. SO.... i was wondering what is the difference in 5400rpm and 7200rpm and which one should i buy??? and is there any reason i buy a HDD which has a higher rpm speed than 7200??