I recently purchased a HD Tv for the bedroom. I requested and received a converter box from Comcast. It didn't work with the TV. A Comcast tech spent over 2 hours trying to fix the problem including trying 3 different boxes. He finally gave up. With the conversion I am down to the lower 28 channels. Comcast wants over $15 per month for a HD box. I would rather purchase my own box. Any suggestions as to what I should buy and where? thanks