I'd have to disagree on the Sennheiser cordless models sounding good, though I suppose that could be a relative term; maybe they sound better than other cordless headphones, but I think they sound pretty piss-poor. I was extremely disappointed in the performance, the sound quality was poor and the range wasn't very good either. I couldn't leave the room the base-station was in without getting static/interfence, and sometimes I would get it even in the same room if I turned my head a certain way. I ended up selling them to a friend for about 1/4th of what I paid for them, because my conscience wouldn't let me charge any more without feeling guilty that I had ripped him off.