Recommendations for a reliable, affordable DTV converter box?

[Dubis7]

I have a few Blonder Tongue agile modulators that I'd like to hook into a series of DTV converter boxes to get some over the air channels in my house. Unfortunately, I'm having a hard time finding a coverter box that holds up in the long term. One of mine just died, and the other needs to be reset every few days, or the audio and video will get out of sync.

I'd like to find something that I can basically set on a channel, run through an RCA jack to the modulator, and leave alone. I don't need anything fancy, just basic functions, but I'd like to avoid replacing it every few years.

Any help is appreciated.