BudgetAudiophile

I would like recommendations for a set of wireless headphones. I already have a set of headphones which are of the overhead style, but those cannot be used in all situations, so I would like to get a backup set of in ear headphones. I have a budget around $150-$200, though that isn't hard and fast.

My criteria are as follows:

• Comfortable, inconspicuous
• Good passive noise isolation. Active noise cancellation is a potential asset, especially if it can distinguish speech from other sounds, but passive properties must hold up.
• Wireless, preferably with an open standard (e.g. Bluetooth)

Audio quality is not the highest concern, as I already have a set of wired headphones. I'm just looking for something to play music when I am working.

I already have a transmitter for bluetooth, if the wireless protocol is anything different I would have to buy that. Additionally, I might in the future buy an MP3 player, and some of those come with bluetooth support. If you have any specific suggestions for small MP3 players, put them also in the comments. That's definitely a more long term idea though.

Recommendations?