Hey everybody I know there are plenty of similar questions but here it is. I have a Feb 2011 13.3" Macbook Pro with these specs. Processor: 2.3 GHz Intel Core i5 Memory: 4 GB 1333 MHz DDR3 In order, I'm looking at the Corsair, Crucial, G-Skill, and OWC... and I was wondering... 1. Which one best suites my MAC's specs so I can utilize performance? 2. What's the difference between 10600 and 10666? I'm looking to upgrade from 4GB to 8GB for heavy editing in Logic while also having multiple windows and other applications concurrently running. http://amzn.to/k1x2DV http://bit.ly/LQ2JWH http://bit.ly/KsxCB5 http://bit.ly/jLmtJK Thanks for all of the help.