I have an 87 and listen to music as well as movies, and there is no way I would change to the Denon models you mention if music is your prime concern.
If you are more into movies than the Denon models give you more features (They are newer) and are good with movies, however the room correction software sucks big time, so be prepared to put significant effort in to get the best out of it.
If music is preference and you want the latest features, take a look at NAD, Arcam, and Anthem etc. (Which also have fantastic room correction systems) Marantz can also be good (They tend to be more musical than Denon) but the room correction is as bad as the Denon so work will be required.
Make sure you have a listen to them with your system (Or similar) at a dealer, as not all amp/speaker systems work well together.
Bill