Are you serious? Wow, I know D* uses both internal and external. So if I want HD and PVR, I need to go HR20/21/22/23?
i'm guessing you mean E* which is for dishnetwork. and yes those models you listed are the dvr's for D*

Are you serious? Wow, I know D* uses both internal and external. So if I want HD and PVR, I need to go HR20/21/22/23?
So I can't take a regular HD box and turn it into a PVR by plugging in an external HD?