[jocampo]

What's more relevant for you: having internet/email access or be able to read books. Also, did you check the titles or books you want in B&N and/or Amazon online store? I would suggest to confirm prices and book's availability before getting any device.

Now, if you really need a device than can browse the Internet and in an "ok" manner, the Nook Color is for you. Kindle will let you browse the Internet and without the need of wifi (for the 3G model) but is more suitable for emails and basic stuff, no fancy pages with graphics or those kind of things. I also find more comfortable writing long emails with the Nook Color instead of Kindle; Kindle physical keyboard is ok but writing long emails is more difficult.

On the other hand, if you are serious about reading, nothing compares to e-ink. Kindle is light and really portable and reading for hours with proper light is really easy for your eyes.

As an alternative, you can also get a Galaxy Tab. Full access to Android market out of the box and you can read and write emails all the time, even when no wifi is available and in a more secure manner. You will have access to Kindle, B&N, Sony, Kobo, etc, is like having a mini computer in your pocket.