If I was looking to upgrade today, I would definitely be looking at these over the Amazon offerings. Just not a fan of the Amazon cloud ecosystem.
Sticking point for me (and I admit to not looking at the specs yet) is does Kobo handle B&N's DRM'd epubs? I have many files for my NOOK at the moment that I don't want to lose. Or would I have to use Calibre and the various plug-ins to get those files to work? Totally doable, but I like the least hassles possible.