And a Roku 3. Both are very nice. The Amazon Fire TV (2015 version shipped in 10/2015) is much more polished. I'd skip the stick.
Problem with Internet detection on my 2013 P50ST60 required factory default reset. When rebooted, Amazon app was missing from TV and Viera Connect App Store. Factory techs told me Amazon app no longer available for any model. Recommended streaming player, like Amazon's Firestick or Roku.