I found the Crucial m4, 512GB verision for $399 USD on Amazon. In your opinion, is that a fair price and is it worth it do you think? I know "worth" is kind of open ended and it all depends on the user, but for somebody who does regular computer stuff, school work, video editing, and music production, do you think that's a good price for such an upgrade? I've heard good stuff about it but thought I'd get a second opinion from you all before I spend 400 on it. Thanks! Edit: I have a late 2011 15" MacBook Pro running at 2.2GHz with 4GB RAM.