Hey. The old 2.53 MBP had 6mb cache and I was about to buy the new 2.53 MBP when I realised Apple have halved the Cache to 3mb. I work in Sound Design and was wandering if the performance of the old is even better than the new model with apps like Pro Tools. Why have the downgraded the chips when they could have used the old ones? Does someone know the difference? Is the old or new 2.53 better.