I wanted to share the following experience.
I have been a long time user/lover of my KDXG. I like the screen size and the feel that I'm reading a page that can comfortably display a pdf. However, recently I decided that I wanted a smaller reader to carry with me when I traveled. After looking at the Nook Touch I decided on the K3 for a wide variety of reasons.
The interesting thing is that I find that I'm reading a lot more. The K3 is easier to carry so I take it with me where I might have just left the KDXG behind. I also find that when I'm reading the typical mobi file I tend to grab the lighter and more comfortable little reader. Sure, I wish that it had one more inch of screen but, its size works.
I still love my KDXG for some tasks but, for the rest, my k3 does just fine.