The one that is right for you, of course, but how do you decide that?
Stephen Windwalker's book will help you to decide..
Stephen Windwalker in "The Complete User's Guide To the Amazing Amazon Kindle 2", covers the three that were available last fall when he wrote the book:
Windwalker covers not only differences in costs, but weight, screen appearance, battery power, placement of keys, and other features that make differences that to some will be even important than price.
The "First Generation Kindle" is no longer being manufactured, but Amazon offers a re-furbished version, and it is also available from several third-party vendors.
Steve Windwalker gives advice on where to find it... why you might want to buy it instead of one of the newer models ... and even, if you have a Kindle 1, and want to upgrade, some ideas on what to do with the older model.
He also describes and gives the pros and cons of the Kindle 2 and the Kindle DX.
This book can most likely help you make the best decision on which Kindle to buy... and at $2.99 for the Kindle edition, that makes it a real bargain.
If you don't have a Kindle, you can read this or any Kindle eBook on your PC or Cellphone, by downloading a free eBook reader here:
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For more, check out the descriptions and the reviews and the following pages:
Search Amazon.com for kindle 2 cover