I recently bought a new MacBook Pro 2012, Non Retina model, 8 GB ram, 750 GB HD, 2,6 GHz. I also have a 2008 MacBook aluminum, which i switched the optical drive with a 115 GB SSD. My 2008 MB boots a lot faster than the new MB of course. So, i want to upgrade my new MB with an SSD disk. My question is this. Shall i go for the 6G types, i read there are several problems with them on MacBooks. What is the difference between 6G and 3G models? The use of the MacBook is for music production (i have all my samples in an external USB 3 disk, so i guess if Logic is installed in the SSD, everything will work pretty fast) and use of digital djing such as Serato. So i'm thinking of getting a 256 GB disk or even a 512 GB and also keep the default 750 GB HD for my mp3s' while playing with my Serato system. Can anyone suggest a good solution? My current SSD on the old MB is from OWC.