Really, any of your top 3 choices would be great. If you use a lot of Amazon services and content, then the Kindle would be ideal. If you have a desire for a digital pen, then the Note 8.0 is the better choice. If you'd like to run Windows Programs and have full Windows compatibility, then the Dell is the right choice. I'm not sold on the Nook vs. the Kindle, honestly, given Amazon's much stronger content ecosystem.
-------------------- Lisa Gade Editor in Chief, MobileTechReview