When you boil it down, a laptop can do more for the same money (or less, depending on your out the door price).

Obtain as much internal storage as your budget permits, and you think you need (look at your music/movie library, then add more so you can add content later on- i.e. add extra capacity). The mini's screen size is a little too small IMO to be considered much more than 'toy-like', although the actual device functionality is quite nice.

A lot of this is mostly personal preference, so factor in yours vs mine or someone else's ;).