We use Plantronics bluetooth headsets in the call centre where I work, and they *are* the best, however they're probably much more than you need, have a large base station for charging, and are quite expensive. If you're planning on wearing it for 8 hours a day and using it in mission critical applications like we do, then its worth paying 4 times as much. If not, then just get one of the consumer brands and save yourself some money. For home use I have a SonyErriccson, and its battery life is average, and though the build quality is quite good, it has a bit more weight than many of its competitors. The only other one I've tried is a Nokia: very compact and foldable, light, but not very comfortable to wear.
I'd check out the Logitech ones and see what you think.