[Bookworm_Girl]

I can relate. I like my content to be organized. In my opinion, the Sony does collection management better. I like my K3 very much, and the screen clarity is fantastic. However, I still use my Sony as my main ereader to store my large library. I do think you would like the K3 organization better than the Nook.

First, the Kindle does have collections like Sony. They are similar in that you can assign one book to multiple collections. You can also mix store-purchased and side-loaded content together in the same collection. You have to assign special characters in front of collection names to force them to list alphabetically first when doing title and author sorts. People have developed quite sophisticated methods of how to assign special characters to do category and subcategory sorting. church mouse has already mentioned that Amazon expects users to create collections on the device, and you'll need to use software like the Kindle Collection Manager to do this externally. With the Sony, you just don't have to go through that much effort to customize.

Do you plan to use periodicals? You cannot put newspapers, magazines and blogs into collections on the Kindle. They clutter up my screen. I miss the Periodicals "container" that the newer Sony models have.

Have you checked out the new Sony PRS-350 (5" screen) or 650 (6" screen)? They have the new Pearl screens, and the clarity is on par with the K3. You might be able to find one on display at a nearby Borders or Best Buy. At Best Buy you could do a direct comparison of Nook, Kindle and Sony.