I've bought the mid-2009 13-inch 2.26 MacBook Pro (5,5) when it came out. Mine has the "stock" 160GB HDD. My question is very basic: Is there "any" 3rd party upgrade HDD that has been proven/tested to to work with my MacBook pro model? BTW....I have the EFI 1.7 firmware installed. I've researched this topic at nauseum......and am more confused now than when I started the research I've read so many posts of "beach ball's", "EFI rollback's", etc.... that I'm not sure which way is up at this point.....with regards to whether or not I can "successfully" upgrade the HDD on my MacBook Pro. Thanks in advance!