I second the SE215s. I just started using them 2 weeks ago after going through 3 different pair of bluetooth headsets (I highly recommend this pair of bluetooth buds if you're dead set on wireless).

The SE215 is the first pair that does not not fall out of my ears, sounds great, and blocks ALL sound. It, however, does not keep talkative people from waving around in front of you to get you to come talk to them.