I'm moving into a new home soon and need to decide which DVR to get when I re-start my DTV service. I have a new 4k TV and plan to get equipment for 4k service for just this single TV. My other TV's will be used with streaming services only. I understand I'll need a C61K-700 client and either the HR54 or HS17 DVR. What I'm not sure about is which option is less expensive for a single TV application. I know DTV has all kinds of charges for HD service, DVR's, TV's, etc, etc. Will one of these DVR's be less expensive than the other?