The type of HD converter that you need must be able to decode the "QAM" signals that cable tvs use to modulate the HD signals. CATV systems use QAM....over the air broadcasters use 8VSB.

One problem sometimes is the channels or frequencies that the CATV system uses for the HD channels. Sometimes they can be very high and I have seen some tvs built-in hd converters that are not able to scan high enough to see the hd channels. This problem probly won't happen....I just thought that I would give you one more thing to worry about....lol.

I would recommend the LG converter. It sounds like it can do both so it would give you the most flexibility in the future.

Happy Hollidays,

DaveT