I can get an XM commander at a really good price, so I'm considering putting XM into my 2003 Dodge Ram pickup. The stereo in the truck is the OEM AM/FM/CD only unit. My understanding is that the commander uses FM transmission to get the XM programming to my stereo. How much does that impact the sound? Will it be basically standard FM quality? Since I would have to install myself, I don't have the truck's service manual and I'm really not looking to tear my dash apart as a great experiment, I'm doubting that any type of line in to the back of the stereo is an option. Unless of course, somebody in here has done it themselves and can convince me it's worth the (minimal) effort.