So, after debating back and forth between the Vertex 3 and the OWC Mercury Extreme Pro 6G I just can't justify the price per GB for the speed increase. I mean 240 GB for about $600.00 is just outrageous. I think in the future I will go for the OWC 6 GB or similar but I really need at least 500 GB drive and for only $99.00 (Amazon) you can't be the price per GB. Anyone with the 2011 quad-core go from the stock 750 GB 5400 to the Momentus XT? If so, what kind of speed increase are you seeing?