I know this has been discussed so forgive me for starting a new thread. Have heard some conflicting results. In the near future I plan on purchasing a new MBP 13" and will want to upgrade the HD myself. Is there any reason NOT to upgrade to a 7200 rpm model? All I have heard is that the 7200 route may heat up more than ideal. But overall, it is at least noticeably faster. Two HDs that I have seen a lot of on threads: Western Digital Scorpio Blue WD5000BEVTRTL 500GB 5400 RPM http://www.newegg.com/Product/Product.aspx?Item=N82E16822136381 Seagate Momentus 7200.4 ST9500420AS 500GB 7200 RPM http://www.newegg.com/Product/Product.aspx?Item=N82E16822148374 Any more thoughts? Thoughts on HD size are also welcome but figured I'd shoot for the 500GB since they are so cheap and wait 1-2 years on falling prices of SSDs.