I'm going to try Apple's iPhone Bluetooth headset.

However, I love my Aliph Jawbone - particularly after I customized it. I turned the Jawbone into an in-the-ear-canal headset to block out 20 db of background noise so I can hear callers well even with high background noise levels.

The Jawbone now has the best sound - as well as having such good noise suppression that the person calling me believes I am on a landline.

I don't know if Apple's headset can match the customized Jawbone's capabilities - given it's on the ear design. It isn't designed to block out noise since it doesn't go into the ear canal.