I'm a professional photographer and i just purchased a mac pro. I wanted to spring for the 3.0 or 3.2 processor but didn't have the cash to do so. How much of a difference does a dual quad core 2.8 vs the 3.0 or 3.2 make? I decided to put my money towards ram, any idea who makes good after market ram? I'm thinking crucial but I would like a second opinion.