My teacher has a 20 GB one.....and if you aren't using it to store files and such from your computer, there really is not point in getting the 40 GB. I mean, think about it, are you really going to put 40 GB worth of music on your iPod? You wouldn't be able to keep track of them all.

My teacher has about 2 days worth of play time on his iPod already and he has barely even used a fraction of the memory. He also bought this speaker set for the iPod and damn, does that thing get loud.