I am on the fence with MBpro retina Vs MBpro. I am ready to buy and need to know a few things. My main purpose is music recording. I am between beginner and intermediate techwise. I don't understand a few of the differences of the MBPRO and MPPRO with retina and whether there are pros and cons with regard to recording. I have no audio interface but have heard FireWire is best. Y or N . I am not married to retina display as I want to record music. I want the best technology I can find. Having said that is their any restrictions that the new MBPRO has with regards to recording audio? What does recording to a different drive than primary drive mean( saving to an external)? SuperDrive pro or con. I want to be able to take my interface( yet to buy) and computer back and forth to record at least 4 audio simultaneously( more is interface is compact and easy to travel). Plan to purchase Logic pro9. I have looked at the non retina MBpro and there are hard drives vs flash storage. Any benifit or hindrance to either? More info is better. Lay it on me.