Discovery is an older model from Plantronics. I remember it having mixed reviews. Based on the most current mono-headsets on the market right now, these are the ones that have been regularly listed at the top:
- Jawbone Era
- Plantronics Voyager Legend
- BlueAnt Q2
- Jawbone Icon HD
If you're going for style over substance, then I'd go with whatever best suits your needs in that manner.