I'm about to install my 2nd (additional not replacement) HR20-700. My first unit is 5 weeks old and works great. I receive locals OTA just fine. I use the 3 LNB dish with an Aspen Eagle powered 4X8 switch. I've read about the Zinwell WB68 & MPEG4. Question: I see no reason to go to the AT9 and Zinwell WB68 now. I guess I'm reluctant to rock the boat too much. Am I missing something in my reasoning? Any comments are appreciated. Thanks....