It's time to upgrade and I'm uncertain whether to opt for a dual or quad core processor for audio work. Does logic use threading? I'm in a position where I want to use this machine for multiple tasks, and my understanding is that Quad-Cores only benefit certain applications. If I'm going to be working on audio, but then other times working on word processing, downloading, browsing, and running multiple yet simple applications simultaneously, would an i7 dual core of 2.66g be faster than a 2.0gh quad core? Excuse my ignorance. Also please direct me if this has been outlined elsewhere. Curiously in MBP's when was quadcore introduced? Thanks!