Ok looking at my options here. I know that a 7200RPM drive has performance benefits, and power consumption losses - but I think I need the performance of a 7200rpm drive unless it's not noticeable. The next thing is that is it better to buy the Apple 7200RPM drive at time of purchase, or just buy one from Seagate on my own? Does anyone know of a really high performance 7200rpm drive that you can stick in these things? Say with 16mb cache?