Adhesive backed Velcro is a wonderful invention.
The long cable isn't necessary, and can be replaced with a shorter one.
I agree that the transmitter is bigger than I'd like, but the RS160's are a viable functional option to the TDK WR700's.
IMO there isn't a better setup than the no longer available Auvio's, and if I ever have to replace mine and there are no others available by that time, I'll go with the TDK's.