Here's the story: I have a early-2008 white MacBook that has finally been dropped support by Apple (no longer upgradeable for new OS's). I'm debating whether I should keep my 2008 white MacBook and get a new iPad 3(/mini?) for med school (to annotate lecture slides, e-books, etc.) or forget about the iPad and a get a new 13" MacBook Pro to stay current with OS X and any app compatibilities? Any advice?