I've compared this Zenith DTT900 with the Digital Stream DTX9900 and here is my result. With a regular analog rooftop antenna I've had since 1985, both of the units picked up same number of channels and very similar singnal strength. Digital Stream has a better sound quality, I didn't have to crank up the volume like when Zenith was plugged in. In my second senario, I used a rabbit ear (tv top) anntena and Digital Stream could not pick up many of the local channels. Your safe bet would be to get the Zenith. I get all of the over the air hd channels in OC, CA.

I've compared this Zenith DTT900 with the Digital Stream DTX9900 and here is my result. With a regular analog rooftop antenna I've had since 1985, both of the units picked up same number of channels and very similar singnal strength. Digital Stream has a better sound quality, I didn't have to crank up the volume like when Zenith was plugged in. In my second senario, I used a rabbit ear (tv top) anntena and Digital Stream could not pick up many of the local channels. Your safe bet would be to get the Zenith. I get all of the over the air hd channels in OC, CA.