Shield TV + extra storage + HDHomeRun tuner is still a great device for getting OTA TV. The only downside is that more recent versions use the Google Android TV launcher which is filled with a garbage truck full of ads, often for things I would never want to watch (horror movies? Nope!). Yes you can replace the launcher, but that's a pain. Would love to pay more for a device that has updated codec support, no ads or…
I wanted to do this and got a Shield last year but returned it because of a live TV bug with the Android Plex client. The programming guide stopped working and could only be fixed by restarting the app, but on Android quitting to the home screen keeps the app running and you can't force quit without going into menus. Sadly that's the OS and changing a launcher didn't fix it.
Google TV apps leak memory like a sieve, so it's pretty common to need to manually close all other apps to make the one you're trying to use work. Even !y wife just dies of now as soon as any one of the apps starts acting up.