What are your speakers?
I have my NAD 3020 connected to Dynaco A-25's and am quite pleased with the sound (so much so, that the 3020 bumped a Sansui Six receiver aside, at least for now).
My SL-1210 M3D turntable seems to be especially good with this combo.
I've never had a Yamaha receiver, so can't help you there.
Good luck!