Considering the pricing of the Onkyo 906, you should be looking at the Denon 4308 which gives you WiFi connectivity and HD radio etc, much closer to the same features of the 906, but if you have standard def inputs and want the best upscaling then the Onkyo is clearly the one to buy.

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