also consider Krell Foundation, great reviews. there is a used unit here on the 'gon for $4k.
Most manufactures will be releaseing new A/V processors for the new sound format, 11.1, for ceiling effect speakers in time for CES, since that is not needed by you, you may do well with a current model close out. I prefer Marantz sound over Integra, and most don't like Emotiva due to reliability concerns.
How do you like your new Samsung curved 4 k TV? I am thinking of getting that unit as well. Did you compare to the Sony?