If you plan on upgrading I was an owned a Sony STR-DE845 and was extremely pleased with my switch to Yamaha. My dad owns a Sony STR-DA1ES and it is very clean sounding, but lacks a bit of depth in soundstage (perhaps because it uses 96khz/24bit DACs and my Yamaha uses nine 192khz/24bit DACS for the individual channels) but all in all a good sounding unit.
I would recommend auditing
Yamaha RX-V1600/2600
Denon AVR3806
Sony STR-DA3100ES (similar internals as the older STR-DA4ES but upgraded DACs)
Outlaw Audio Model 1070
~Bob