I know it is hard to believe, but I am quite sure that the even less expensive way to do to for sound quality is to just grab a Denon AVR-X3800H, or AVR-X4800H when they are on sale. People seem really impressed with DLBC, and now ART, see
@dlaloum 's posts about his experience with ART, not sure if he posted his impression here but definitely on ASR. Denon, Marantz don't sound better than Yamaha's but with ART, I don't doubt most people will actually hear better sound quality overall, except for those who have very little bad influence of their room acoustic and speaker placement.