Any HD geeks out there?

I’m looking at this television, which is on sale at Costco for less than a grand.

It looks good, but I found this one review that’s giving me a little heartburn, because we have DirecTV, and planned to upgrade to a triple LNB dish and new HD TIVO receiver.

It is an excellent set for HD OTA and regular definition satellite receiver. But I recently upgraded to an HD receiver for DirecTV and found out it doesn’t have the capability to keep up with the HD satellite receiver. There is a phenomena called macroblocking that occurs since the digital picture cannot be translated properly. Defined – it is an awful picture on the 480i channels, which means about 95 of my programs looked awful.

I searched all over the web, and couldn’t find any other reference to this problem. Is it a real one, or is this an isolated problem for this one reviewer, either because (s)he didn’t understand how to set it up, or there was something defective about that unit?