I have three myself.
My Old iPad 1, then I got a new iPad 2 64GB. Then my work gave us all iPad 2 64GB's for route planning. I am thinking about selling the ol' iPad 1 one.
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Two originals...kid toys now, one iPad 2, now my music station and backup, and a new iPad. 4 is a good number, but there are five in my family, soooo.....
Currently I have one iPad for 16gb, which was I buy in last year. Now, after releasing new iPad, I am planning to purchase this with which is having great and advanced Retina Display feature.