For my money, the closeout on the Sherwood R-972 with Trinnov Optimizer is the best bang for the buck, bar none.
Trinnov is obviously the star here, and unfortunately I do not think we'll see the technology in any sub-$7000 device anytime soon.
The R-972 itself has decent hardware, although it has no online connectivity. On the other hand, I am yet to see a receiver that can come close to the functionality of simply having a $99 Apple TV attached to it, so it's no great loss.
But, as I said, Trinnov is really the star here and makes the R-972 a steal at less than $600.