For music, navigation, and communication with friends, I use the Sena 20S Evo. For me, music is an essential part of my travels because it emphasizes the travel experience for me without distracting me too much from the traffic.
The Sena 20S Evo is a Bluetooth communication system which unlike most other communication systems has two Bluetooth chips. This allows me to connect my iPhone, which I carry in my breast pocket with me while using my iPad Mini on the bike for music and navigation. Furthermore, it is also possible to listen to music and to communicate with the passenger. It can even be heard music together, which would not be possible with just one Bluetooth chip.
Pairing with other Sena systems is a piece of cake and pairing with third-party headsets is also possible through the universal mode with minimal restrictions.
The battery life of the Sena 20S Evo is enough for me a whole day and should it be empty, I can also charge the device during use.