Hi everyone, I'm a newbie here and this is my first post so please go easy on me Anyway, I have a mid 2009 Macbook Pro Core 2 Duo with 2.26 GHz and will be upgrading both the RAM and hard drive. I've done a fair bit of research regarding which brand and have decided to go with the Hitachi Travelstar. However, before I buy the hard drive, I have a few questions which I hope someone can help me with. I did try to search for the answers online but as such things go, there are conflicting opinions So I thought I would just try and see if I can get a direct/straightforward answers here. Any help is much appreciated So, the questions: 1) Is my Macbook Pro compatible with the Hitachi Travelstar? By this, I know the physical dimensions fit, but I'm actually wondering if there are any known problems in practice such as the dreaded firmware EFI issue or dropping the 3Gbps SATA to 1.5 speed issue, etc. I'm not sure if my specific Macbook Pro model is the same mid 2009 model that has all these problems so I just wanted to make sure. 2) Assuming the Hitachi Travelstar is compatible, which model is better and why: the 7K500 or the 7K750. I'm especially interested in those who have personal experience of either of these (or both!) 3) Should I buy the 5400 rpm or 7200 rpm version? Why? As of now, I'm trying to decide between 500 Gb, 640 Gb or 750 Gb (is there any difference to performance in regards of which size)? 4) I have also read that other recommended brands are WD Scorpio Black and Seagate Momentus XT: however, there are many horror stories surrounding these with mid 2009 Macbook Pros (again, can someone please clarify if my Macbook Pro model is included in regards to this?)...if someone can recommend any other alternative brands and models, I would gladly take a look. ** As of now, I'm on Snow Leopard but plan to use Lion as soon as I complete the RAM and HD upgrades. Well, I hope my questions are straightforward and I really hope someone will be able to help me with these. Thank you for taking the time to read (and hopefully answer) Cheers!