I use a Plantronics 903+ stereo headset with my HD7. The sound quality is INCREDIBLE. Especially when you consider the price. It retails for around $90 and I got it 30% off. It sounds better than many $200 Bluetooth sets out there. It has a major function button on each ear. Left ear for phone functions(long press for TellMe) right ear for music(play/pause with one touch to start playing all music on shuffle) Power and volume behind left ear, built-in bass booster that preserves mids and highs, and it's designed not to fit tight in order to let you hear what's going on around you. It even pumps outside noise into your ears to help you hear when you pause your music. It only seems to pick up audio from Zune, though. I haven't tried streaming radio on it, but it doesn't work for YouTube.