Any wireless gear from Sony bound to be good. I have a set of ca. 1992 Sony infrared wireless gear, and despite being analog (albeit with Dolby C noise reduction), the sound quality is superb, and the range incredible (I can leave my room, and as long as the door is open, it can still find enough IR signal to give clear sound for another 15 feet).

Of course, if you need to go through walls, you have to go with RF models.

Check out www.sonystyle.com -> Accessories -> Headphones -> Wireless. (Can't give URL, it'll expire.)

tooki