I have a mid 2009 Macbook Pro 15" for which I'm looking to upgrade the Hard Drive. The current HD capacity is 250GB. I'm looking to double that to 500GB or possibly 750GB. Anyone have any recommendations? Also, how easy/difficult is it to install? What would be the easiest approach to getting all my data (OS, programs and files) onto the new HD? Other than upgrading the memory, I haven't tinkered much with my Mac. My background experience is I used to build/upgrade PC's before switching over to Mac 3 years ago. Any help would be greatly appreciated.