I initially bought the one that monoprice has for real cheap, and not surprisingly it degraded the signal and introduced a lot of interference. I then purchased the Niles AXP-1 and have not had any issues. This is a basic passive switch with no remote.
As for what rdavwhitaker said, the pure i20 is such an ipod dock that is reasonable in cost. I have not heard it though.
As for what rdavwhitaker said, the pure i20 is such an ipod dock that is reasonable in cost. I have not heard it though.