I asked the seller about the small difference between the 806 and the 876.
He said he made a mistake with the 876, and that the price should be €790. After this, the small difference is due to having bought the 876 during Onkyo's price drop earlier this year.
I don't know, I can afford to spend the €790, but I'm not feeling confident about Onkyo's recent firmware problems and the resulting recall. The question about the lag is still pendent.
Audissey really sounds good, but I'm the kind of guy that does not like auto setups. I really like to tinker with the options.
If you went on a manual configuration (EQ settings), would audissey be that much better than Yammy's version? I'm only interested in optimizing the sound for my listening position.