Sennheiser  RS-65 Wireless RF Circumaural Headphones with SRS Surround Sound Processor (Black)
Great Sound and Features!
I've been researching wireless headphones for a few weeks, and I decided to spend a little more money than I originally anticipated.  I have not been disappointed in the least with the RS-65.  The sound is great!  I previously used a wired pair of Sennheiser headphones (HD 545), and I think the quality is quite close.  <br />At first, I was concerned that the all the computer and electrical equipment surrounding me in my cubicle could cause a problem.  These phones work at around 925 MHz, and there is no interference or distortion.  I also was concerned about the battery life, the documentation claims that the headphones run for about 4 hours on a single charge, but they include two batteries, so I can listen to music all day.  <br />The one area where this pair does not compare favorable to the HD 545s is in comfort.  The wired pair has larger plush ear cups, where the RS-65 has smaller cups, and a bit more spring tension on your head.  I find I need to adjust them every 20-30 minutes or so- not exactly a big problem.<br />All in all, great sound quality, great features and performance, definitely worth the money!