Hi. I'd like to buy a HD for my MacBook Pro and I was wondering if anyone had any recommendations. The specs I'm looking for are: 7200 rpm 750 GB and I'm pretty sure it has to be a 2.5" drive Would this be a good hard drive: http://www.amazon.com/HGST-Travelst...kaging/dp/B0054CFLTY/ref=cm_cr_pr_product_top ? What is 512 byte emulation (512e)? I'd like to spend about $75 USD.