Ok I changed my mind. I'm gonna be using my Raptor to install windows on and replace the stock 320GB HD. Is there 500 GB HD good ? Which do you recommend? I read about the Samsung F1 etc. But I can't really find any info on which of these HD's is the newest and most reliable. For those opting to use the stock 320GB HD for backup , maybe Time Machine etc. What are you then using for the Main HD for OSX and apps? Also, should I get the exact same size 320GB HD to match up with the stock one for Time Machine? (suggestions for a 320 GB HD? , I saw a few nice WD ones). I'd like to order my 3rd HD this weekend and just wanted some feedback. Thanks. Great for comparing HD's http://www23.tomshardware.com/storage.html This is the one i'm thinking about getting. http://www.newegg.com/Product/Product.aspx?Item=N82E16822148140 I know this has been talked about in a few places, but I havent seen many options directly pertaining to my setup.