Hi, I've searched and read multiple threads on the topic but none tailored to my specific needs and would appreciate guidance. I currently use a Vaio Core 2 Duo machine for music production professionally (believe it or not) which has and continues to tax the CPU. I also do what most others users do with their laptops (photoshop, video encoding/coverting dvd & bluray film,web browse,youtube, email, etc etc). The laptop will essentially be a mobile desktop workstation that i'm looking to last 5-6years. I've made the decision buy (before the June 10th 2013 announcements) a cMBP Quad i7 with the Hi-Res screen option and plan to increase the RAM with 16GB HyperX pnp and the HDD to a 750GB Momentus XT. The rMBP although a beautiful machine wont work for me due to HDD space, I/O, long term upgradeability and price. What i'm finding difficult is understanding and choosing either the 2.3ghz model or 2.6ghz model (2.7 is out of my price range). I understand web browsing, photoshop etc will see no difference for the extra 0.3 increase but will audio production,rendering and overall CPU benefit ? Will the extra 512mb GPU ram that comes with the 2.6ghz model make any difference? Will the turbo boost essentially make the 0.3 increase irrelevant once activated by doing CPU intensive tasks? Any advice or help is greatly appreciated.