Which Logitech Harmony would you recommend if you are using the SA8300 HD? I have heard that the Harmony 550 has the A and B but no C that would be needed for the SA8300. I know that keys can be mapped but would be nice to have one that had the A, B, C, List arranged so they were easy to use.

Any suggestions?

You can map the A, B, C buttons to the LCD screen, which would be the easiest and most convenient thing to do. My brother has the same box and he uses the Harmony 360, which was designed to match the Xbox360. It actually has dedicated buttons for A, B, X, Y. You could map it to those if you want.

http://tinypic.com/jf8f2e.jpg

Thanks, will check that one out :)