Originally Posted by kmp14 Harmony Remote Question: Which Harmony models are people using successfully with the echo?
I just purchased two Harmony 300s (refurb units on ebay, $18 Buy it Now price) for a couple of bedroom TVs and they are working fine with the Echos on those TVs. The Harmony 300 is a limited Harmony with no LCD screen, can only handle 4 devices, and somewhat limited programmability, but are perfect for my purpose, since I only need them to run the Echo and the TV. MUCH MUCH better than the supplied Echo remote!
I also have a Harmony 670, but it is for use with the A/V system in the family room, and is working great with my HTPC with a Ceton InfiniTV 4, a Panasonic plasma, Pioneer A/V receiver, and a Panasonic blu ray player.
I had not tried the 670 with the Echos until you prompted this question, so I tried it today and the 670 seems to operate the Echo just fine.
I have all the Harmony's programmed to the Microsoft Windows Media Center SE "device" in the Harmony database.