iPad 2- Basically the model for all other tablets and the leading tablets in the market. Lightest of 3 tablets at just 1.4lb. Can stores more data than the other tablet models. Plays music and video through iTunes. Has the longest battery life. Has the best picture quality. Lots of Apps, apps and more apps.
HP Touchpad- Weighs 1.6lb. Plays music through Beats audio. Can play audio in more formats than iPad or Motorola. Has a new version of WebOS. Has flash player. No apps. Two piece hardware, not durable.
Motorola Xoom. Weighs 1.6lb. Difficult to use music media player. Has the shortest battery life. Has a dual-core processor. No apps.

Tablet Prototype: The Sony Tablet. Sony announced yesterday that it intends to release its new prototype tablet to the market tomarrow. It will be be based of off Google's Android Operating System. Two different versions will be release. The first version will have an single large screen like most tablets on the market, while the second will have an unfolding touch screen. They have not yet decided on pricing.

If I were to choose a tablet, I would choose the iPad. Has lots of space, iTunes, APPS... on the con side, it lacks flash player, which is annoying to me.