I use an AKG SR60, which cost $800 US ... barely use it, however!!
I think I've used it at one gig in the few years I've owned it. Even a high end wireless system like the AKG still thins the tone out too much for my taste.
That being said, the higher end AKGs are about the best you can get, aside from having Shure custom-make you one. (Which they do)