iPad 2 is prob the best but it seems the cool factor seems the biggest reason.
I remember a couple short years ago when many people on the board thought tablets (iPad in particular) were a fad and wouldn't have a market.
I think they have a market but it's not as easy as people think. We just ran a pilot program with some employees using ipads to help customers and it was pretty ugly. They're still working on it but the main focus, at least for us, is still hitting the smartphone app market