I was considering purchasing a XM radio unit to use in both my house and vehicle. Then I heard about HD radio, which is free after you buy the tuner. When XM rolled out I was told that it had good sound quality. But after reading this forum I see the XM people have gotten greedy and sound quality has taken a dive. I have directv, and listen to the xm channels on it through my home sound system. They sound pretty good through that, just a reduced amount of channels. So, which sounds better? I have been told that "HDradio" is misleading and doesn't sound all that great anyway. If I am going to pay 15 bucks a month to listen to the radio it had better sound pretty good. Thats where hdradio looks appealing, but there are currently 2 stations in my area that I would listen to though.