They should be great for music and calls quality.

Bose Mobile In-Ear Headset - Bose Headsets and Headphones

I have the non-mobile version. Should be the same as mine just with the addition of a microphone.
In my opinion, Sennheiser CX300-II actually sounds better than that. The clarity is almost the same, but the bass is much warmer and nicer.
Compared to Blackberry Premium mobile headset, its almost same just clearer by a bit.

They work great