Here's a relatively short list of audio devices that Blue Jeans tested and does recommend. Virtually any Sennheiser headset will be high quality (good results with every model tested).
Personal Staff Favorite/Rankings:
The UC Voice 750 was comfortable, and sound output was good, but the microphone let through too much “sibilance” (‘S’ sounds were too ‘hissy’), so the Sennheiser SC60 is still our top choice.
The Plantronics DSP400 had decent sound, but the overall design was clumsy and somewhat uncomfortable to wear.
1. Sennheiser SC60
2. Jabra UC Voice 750 duo
3. Plantronics DSP400
4. Logitech B530
5. Microsoft LX-3000
For folks gathers around a laptop in a conference room you may want to consider a Jabra 410 or 510 Speak.
Jabra Speak 410 and Speak 510 - http://www.jabra.com/products/pc_headsets/jabra_speak__510_series
- it's good for individual office use or for smaller makeshift conference rooms with a webcam setup on a LED display
- make sure you order the USB female to male extension cable if you're placing it in a conference room and want to bring the mic out to a conference room table