If that is your goal, try this. I’ve had one of these for over a year now, it is outstanding. As a bonus, you also get a streaming device as well as a DVR (it’s built in). You can plug an inexpensive 1GB or 2TB external hard drive for storage of your recordings, just about any type will work.
Because it is not on your network, it is good for one TV and one only … but you can take it to another room and plug it into a TV there, of course (it is small and light). The guide is free and the User Interface is beautiful. Because it is not having to transcode signals, there is no delay when pulling up a channel (or when changing them).