Hi, new here. Purchased a MacBook Air last fall. Tossup at the time between that and ipad, and opted for Air because it's more functional for my work, Office spreadsheet functions. Own a 1st generation Kindle for reading. Really would like to have ipad 2, but am I nuts? Probably don't need it, due to the overlap in the technology, so please tell me why I shouldn't be without ipad even with the others I already have. Thanks.