Hi everyone. I just signed up with DirecTV for HD and DVR. SInce the HR20 box is not available, Directv is providing me with 2 boxes (1 HD and 1 DVR). Does anyone else have this combo? How does it work, will I need to switch between input sources or are the 2 boxes tied together in some way? If not, how do you all use these? I'm assuming the DVR box is just there to record, otherwise not used to normally view but I don't really know. Getting the system installed on Tuesday. Thanks