How neccessary is it to upgrade to 32 meg? The only reason i see to upgrade would be to cash more of the tunes, so the hard drives wont have to spin up as often, and to hold a larger database (sounds like there is a limit to the size you can have). I guess the main reason would be that after running custom apps, you might run out of space.... I'm basically asking, at what point do you NEED an upgrade from 16mb to 32, or 64 on a mk2a?? My guess is only if you're running some kind of application that uses a lot of memory (relative to how much is left).