If you want ‘warm’, I would look for something other than Adcom. I had an old Adcom 545. Yes, it was good, but not what I was looking for. I sold it and bought an old B&K (in your price range) and was much happier.
But, what you might really want to consider as well is a separate preamp with an HT pass through. AV receiver will not provide a good stereo experience. Been there, done that. After I got a separate amp (current Belles) and a preamp with HT pass through, it made a tremendous difference in sound quality for 2 channel listening.
But, what you might really want to consider as well is a separate preamp with an HT pass through. AV receiver will not provide a good stereo experience. Been there, done that. After I got a separate amp (current Belles) and a preamp with HT pass through, it made a tremendous difference in sound quality for 2 channel listening.