I know that similar questions have been asked but a search didn't turn up my specific question so here goes. I am thinking of a MBP. I will be using it for the usual stuff (internet, word processing and stuff like that). However, I would also like to mess with audio recording in Garageband and will be doing some image stuff with PS Elements. Do either of these require or perform better with a quad core over a dual core processor? If a dual core is all I need, is there any advantage to the 2.7 i7 dual over the 2.3 dual? Thanks in advance.