go4bal,
I tried aftermarket Sirius satellite radio in my previous ride (as well as nav system) and got those as options on my Ridge. I used the JVC KT SR-2000 auto kit:
http://shop.sirius.com/edealinv/serv...dParentID=7870
Worked fine; has built in fm transmitter so you just tune to an unused FM station to receive on your stereo. The sat antenna is a magnetic disk you place on your roof. The install recommends concealing the wire and running to back of roof of vehicle, but I just ran the wires over the sunshades and past the driver's side door seals onto the roof. Worked fine for the 6 months I used it.
Come to think of it, I need to sell it now that I have XM.