or the Onkyo 805. A lot of people are afraid of certain issues, but Im using it as a pre/pro, and it works very well. It will offer more features and flexibility than a lot of others at current prices. And the amp section is, more or less, in a different league at current prices. Its all a matter if you want that much amp. The receiver is Very Heavy, Very Big, and runs warm. Fits in budget, no problem.
In fact, I've been reading the newer 806 is actually a downgrade. I think* they are changing the amp to the same versions as 7xx and 6xx series, or nearly half of the current 805's spec'd amperage. Some speculate this is due to lack of profits from putting so much reciever at such an affordable price.
I am not so aware of the improvements of the 606 to 605. That being said, the 805 vs the 605:
-preouts
-BurrBrown DAC
-ability to matrix m-ch pcm
-ability to matrix hi-def bitstream
-zone 3? maybe?
-oh ya, a much beefier Ultra amp