Amazon Paperwhite 2 vs. Kobo Aura

I've been in the Barnes & Noble Nook camp the past couple of years, but it's fairly obvious that that ship is on an unavoidable collision course. I've been waiting for Amazon to announce their new Kindle before jumping ship. Now that they have, I need to make a decision.

Amazon Paperwhite 2, or the Kobo Aura?

Which would y'all recommend? Price isn't a concern, as I would go for the Amazon Paperwhite 2 without advertisements, and that's only $10 cheaper than the Kobo Aura. Both ereaders are supported by my public library, so that isn't a concern either.