Honestly, for most people the 2.3GHz should be fine. However, with music production, you might run into trouble with the limited 256GB SSD in the 2.3GHz model. Granted, you could always just attach an external hard drive but I'm not sure how mobile you'll need to be. I'm getting the 2.6GHz as the difference between the 2.6 and 2.7GHz will be minimal.