You won't be seeing me with the upgrade itch for my 770 any time soon. I think I will be more than happy with it.
I know someone who will be in the market for a new amp some time over the next year and I have been trying to sway him towards the 770 with the new pricing.
He however seems to want to wait for the 790 which is fine I guess.
Sounds like it will be a power monster with the need for two dedicated circuits!

Craig