I am highly doubtful of the ability of a critic to judge what headsets will be best for you. I can give you my impressions, but not my ears. Chances are that most of us can use 80 percent of the keyboards out there, 80 percent of the mice, because there isn't that much of a discrepancy in our hand sizes. But ears are different. Some of us can't tolerate anything covering our out ears, others object to an over the head band. We might have different size ear canals which make wearing buds difficult or even painful. Then there are the lifestyle issues: active vs. sedentary, noise cancelling or not.
So this isn't so much a review, as it is a comparison of two wireless, bluetooth headsets that work with the iPhone from Plantronics. In the captions that accompany the slideshow above I'll give you my impressions, my preferences, but I acknowledge at the outset that what makes one markedly better for me might produce exactly the opposite impression for you.
Each thumbnail above takes you to a different page of the review.