I currently have an ATV3 and a Roku. I use the ATV to play my (encoded for iTunes) movies and TV shows with plex connect. I also use it for netflix and YouTube. I use the roku for Amazon Prime. I've been playing around with plex, amazon prime, and YouTube on my ipad2 and using AirPlay to send everything to my ATV. I'm not the best judge of audio or video quality and can't see a difference. Is there one? It seems easier to just airplay everything and control it all out of iPad but not at a degradation of the viewing experience.