I am going to jump in to the comm world with Sena gear, and have a specific wish list of function. Don't ride with anyone else who has comm gear, so this is based on rider/passenger usage. I don't have funds for a dedicated navigation unit, so I would like to use my iPhone 6 for streaming music at the same time as navi while having intercom capability as well. I have been told that the 20S will handle all three things at the same time, namely, if we're listening to music from say, Spotify, that navi instructions will step on the music when called for. In the interest of saving some cash in the purchase, does anyone know if the SMH10 will also do that? I think it should, because both the navi and music are simply audio output signals from the phone, so if the phone will do both functions at the same time (it does...), then the Sena should not care if there is one signal or ten. To prove my concept, I opened Spotify on the phone while driving in my truck and then started navigation, and the navi stepped on the Spotify when it called out instructions, so I figure this should come through the same whether it's the Sena 10 or the 20. Does this make sense?