I'm putting my new computer together, I'm planning on buying everything from Newegg and I'm picking out my hard drives and I have a few questions... One, what is the difference between OEM, and Retail? Newegg mostly sells OEM hard drives, what am I losing by going OEM rather than going to Best Buy or some other store and buying Retail? Second, is it a good idea to run two seperate hard drives? One 40G to run my OS from and other random programs, and one 250G just for games, music etc. I've read that it will allow the computer to actually run faster, plus I was thinking that if something happened to the larger drive (virus etc.) that I would still have the 40G with the OS and all of the critical programs that I need to use the most (Word etc.). Lastly, IDE or SATA? I've been told that I probably will never know the difference, so which should I go with? Thanks.