I didn't see TIVO mentioned, so 'TIVO'
The Roamio I have cost $300 with lifetime service and I have an antenna. The TIVO combines my Amazon Prime, Hulu Plus, and Netflix down in to one interface.
If I want to see episodes of (say) Stargate SG-1, it'll show me what's available from my streaming sources. If an episode isn't available, it'll record it for me when it comes on the air. It's really a fantastic solution and keeps all of my services in one spot instead of having to bounce between them. The software on the TIVO is really the killer app.
Before that, I had a Mac Mini & HDHomeRun with EyeTV software. That handled all of my recording needs, but I still needed Safari for Netflix or Amazon Prime.