I currently have an IPAD 2 64GB and will probably upgrade to either a Mini or Air. I travel quite freqently and like to watch downloaded Itune movies or shows and surf the net etc. I have found 64gb was necessary when I first got the IPAD 2, now with the cloud and dropbox etc, I dont know if the expense of 64gb is necessary. I am also considering a wireless hard drive for storing movies, shows etc. Any advice ?