Nook or Kindle?

I've been looking at Nooks and Kindles - I want one! But which one should I get? I was leaning towards the Kindle, but I stopped by Barnes and Noble and now I'm leaning towards a Nook. Which one do you have? What do you like about it? Or, are you contemplating the same thing? I'm anxious to hear what you think!

Happy Holidays!

Terri