I currently have a subscription to both Spotify and Rdio, but can only afford to keep one of them. I'm trying to get some input as to which offers the best experience on the iPad and iPhone. I don't really use the desktop apps or web apps, I really only use it either on my iPhone or iPad. What I'm most interested in is hearing people opinions on which offers the best streaming quality, which offers better gapless playback/instant start, and which people feel have the best UI for the iOS devices.