Hello, I recently bought a 2005 Monaco 40' motorhome. It came with a non-functioning KD C-322 installed. I want to replace it with something that will just slide into the old mount and power plug. It also has Sirius radio and I am a subscriber to XM radio so I would like to have that also if possible. Can anyone on here give me some alternatives that will use the current setup? It does not have to be a great system, just functional.