You might be able to just buy a DAC and use the Yamaha if it has digital output. That will take you farther soundwise within your price range and provide options to run a music server off of a computer with it as well. With a computer based music server, you may find no need for the Yamaha as well.
I'd recommend a used mhdt Constantine DAC with USB connectivity or similar mhdt Paradisea tube DAC, depending on your taste.
I'd recommend a used mhdt Constantine DAC with USB connectivity or similar mhdt Paradisea tube DAC, depending on your taste.