wireless headphones

These headphones are great, overall!!
Pros:
-Great sound quality. The bass reception is excellent, and if I enable surround sound, they sound better than my 4.1 surround sound system (it's a[n inexpensive]speaker system).
-If you're close to the base, the sound quality is very clear. The reception quality is awesome. The reception is analogous to a cordless phone, though with much better sound quality of course.
-The physical appearance of the headphones is great! As you can tell from the picture, they look nice.
-It gives freedom of movement. For instance, I am a college student. I can have my desktop play lectures in my room while I take my headphones to the study lounge and listen.
Cons:
-MY BIGGEST COMPLAINT about this set is how uncomfortable they are to wear. The design is such that the phones squeeze the head and even hurt my ears at times.
-The reception distance is not 300 ft as advertised; it's more like 150 feet. If you exeed that distance, the sound becomes blurred and begins to cut off. 150 ft is still an excellent range though.
-They appear to be made of plastic. I don't know how fragile the material is but i don't intend to find out by testing its strength.

I really enjoy the mobility and the light weight. The sound isn't bad either. Typical of the better Sennheisers with decent bass and a nicely balanced high end. The downside of the cordless design though is that they lack the extreme detail of the best headphones and the highs aren't extended enough to get a silky topend.
I hesitated to buy these though based upon some comments by reviewers. There is some truth to these comments but they don't bother me. Yes, the headphone cup is a bit small and they do seem a bit tight at first. But I'm an over six foot male with a large head and average size ears. My ears fit fine and after just a couple of minutes they don't feel tight at all. I can wear them for hours comfortably. And reception isn't perfect. I can use them most anywhere in my large house but there are some deadspots based more on how I turn my head than distance. The good news though is that just a tiny head adjustment clears it up.
And lastly I recommend the SR65 as the sweet spot in the line. It has the autotuning feature which I suspect is important to decent reception and it has the surround sound feature which basically seems to feed the deeper bass to both channels. It does give more ambience and better bass. It definitely does enhance the sound of some recordings. The SR85 lacks the surround and substitutes dynamic noise reduction. That's evidently a compander system that according to the SR85 reviews seems to compress the dynamics. No problem here on dynamics.

As many people have pointed out, be prepared for static and temporary loss of signal as you move around while wearing these. It might annoy you (like me) to the point of having to go through the hassle of returning them. I do find them light and comfy, and the sound is fine ifmost of the time. If you keep your head stationary you won't have any break in the sound. But if your head is perfectly stationary, do you really need cordless? My opinion: live with the cord if you can...until the technology gets a bit better... it will.