I personally would go for the bigger drive. I know the advantages of the higher performance drive, but storage is premium for me. But I have huge iPhoto libraries, a fairly large iTunes collection that is rapidly growing thanks to video purchases, and I like the to retain the capability to edit some DV footage while on the go. So I would spring for the bigger drive, but I don't think you can really go wrong. It just depends on what you value the most.😉