So my 60 GB Macbook is filled almost to the brim, way more than is recommended. I'm a student now, and don't want to buy a new laptop until I graduate, so need a bigger internal hard drive. This also means I'm focusing on cheaper disk drives rather than solid state drives. Can someone give me some advice? I'm trying to decide between a 250GB 7200rpm and a 320GB 5600rpm. Here's what I'm thinking: I WAS looking at a 250GB 5600rpm until I saw that it was only $5 to upgrade either the capacity or the spin speed on OWC. I'm curious about how much of a difference the extra 1600rpm will make in terms of performance. I only have 2GB of RAM, so I imagine my computer is somewhat likely to need to temporarily write stuff onto the disk when my RAM is full and thus would benefit from the 1600rpm. However, my battery is also going downhill, so I'm worried about how much extra battery a 7200rpm disk is likely to use than my current 5600rpm. One added item of interest is that the 250GB 7200rpm has 16MB cache, while the 320GB 5600rpm has 8MB. I figured 8MB would be plenty, but maybe I'm wrong. Thoughts?