Been thinking about picking up an iPad and storing all my charts in PDF form on it, as well as a Real Book App like the one I have on my iPhone. I'm doing 2 gigs that involve a lot of charts and the thought of carrying them all on one tablet really appeals to me. My question is this - does anyone know of an alternative method of doing this that doesn't involve forking out $500 for an iPad? I've seen electronic music stands but they are practically as expensive.