4. Amazon Kindle DX

Size: 10.4 inches by 7.2 inches

Price: $489

Pros: Although the larger Amazon ( AMZN) Kindle's size is comparable to those of other tablets, it's significantly lighter, weighing slightly more than a pound. The Kindle is clearly the winner when it comes to presenting text on its 9.7-inch screen. The device is easy to use and ready to go right out of the box. And you don't need a wireless account because Amazon covers the connection charge for Kindle users.

Cons: An electronic reader offers a fraction of the features of a laptop computer. Although the Kindle allows users to access Web sites with minimal graphics, such as Google and Wikipedia, its browsing capability is limited. And forget watching TV or movies. For now, the Kindle is strictly black-and-white and text-only.

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