XM ready? That simply means it has an input for an OPTIONAL XM receiver. Go to BestBuy or online to the XMSirius store and pick one. We habe an old Pioneer Inno and love it. Have mounts for car, home, truck and trailer, so only one subscription needed. Plus its battery powered so with headphones I can use it on a walk or biking. On top of that it has memory to store around 1000 songs.