It depends what you are looking for, if you are looking for something pocket sized that you can carry around with you everywhere the best option is the iPod but if you are looking for a bigger screen for example to watch movies or play games at home the ipad would be a wiser choice. If you are thinking of something in the middle then the ipad mini is the way to go
iPad!!! U can bring them everywhere because they are thin, and easy to carry! I love my iPad much more than my iPhone! I use my iPad a lot for school work and it helps because it's a bigger screen and easier to see! I recommend the iPad.