I don't think you would regret it, the 978 isn't offering anything new that other avr's are not already offering, except maybe for a better price. I bet you could find a comparable avr on sale for the same price the 978 will be going for.

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