I have the 77C1 paired with the 771 and 77DS with the Denon 3801. Awesome setup I must say. I can't say much about the sub though. I have an old powered Pioneer that I hope to replace one of these days. You can't go wrong with this speaker. I picked it up for about $170 including shipping.
I have the 771, 77C, and 2 pairs of 77DS. Only have 1 pair hooked up though. Still working on where to put the other pair.
All I can say is, they're awesome.