going the cheapest route getting xm in the xB and getting the onyx. I'm going to add a add a fuse connected to the female cigarette lighter for power. For sound quality i'm going to use the audio jack unless there is a dedicated hook up in the rear for the onyx via an adapter. Do they make an adapter to hook the onyx where that $$$$ Toyota one would go? There is a button for satellite radio on the stock Pioneer unit. Thanks!