Jay,

PS Engineering is the way to go, IMHO. Also, I agree with the other
poster: Panel-mount and thus somewhat certified audio-players or XM
radios are a HUGE waste of money. Get a portable XM receiver or a
portable MP3-player (doesn't have to be an iPod, you can get a decent
one, too gd&r).

If you fear the cable hassle, just two thoughts:

1. We're talking about one single cable, the audio connection. No power
needed, these units run for hours on battery.

2. That little bit of cable hassle will save you thousands of dollars.

--
Thomas Borchert (EDDH)