That is the reason I have the Harmony as well. The 676 looks like it would work really well for DVR users too as well as those with sattelite systems. My wife liked the interchangeable faceplate of the 676 compared to the 628, I won't even go into the short comings of the 550.

Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70