[Lindca2]

I bought the Nook to replace my Cybook Gen 3, and the Nook weighs about twice as much as the Cybook. I noticed the weight difference at first ("This thing is a brick!"), but honestly, I have no trouble holding it in one hand for reading and don't notice it so much anymore.

I've also grown to like navigating with the touch screen. It's simple to use and I notice little lag time. As others have noted, once you get the hang of the swipe motion for turning pages, that's easy as well. You also have the buttons on either side of the reader to turn pages if you prefer.

Honestly, there are lots of good options for ebook readers out there, and the price points of the Nook and the K3 make them particularly attractive. I suspect you could be very happy with either one, but there are a few key differences that may help you to decide:

Advantages of K3:
smaller, lighter weight
new Pearl screen (better contrast)
longer battery life
easy access to Amazon titles*

Advantages of Nook:
LCD touch screen for navigation, page turns, and color cover images
easy access to B&N and multiple other vendors who sell epubs*
ability to borrow library ebooks*
in-store specials at B&N like free cafe items, reading for free, etc.
book lending feature**

*If you are able and willing to strip DRM on books (not exactly legal), you can buy books in most any format from any vendor.

**This feature is somewhat limited and relies on both people having a Nook. You can also share titles with a small number of family and friends who all have Kindles by sharing an account (for ? up to four devices).

The web browsing abilities of both the Nook and the K3--other than connecting to the respective stores to buy ebooks--are quite limited. I wouldn't rely on either one for easy access to email, etc.

If you have a chance, look at and hold both the Nook and the K3 and see which appeals to you. Both are excellent choices and only your personal preferences will determine which is better for you.