Regardless, congrats for you success in acquiring the 7015, it really is a great model for those who still need the legacy I/O for whatever reasons. There are not even offered in flag ship models any more.
In terms of sound quality in general, all those models mentioned so far are all so similar, so decision based on price is a wise decision imo. As to sound quality specifically for music, it's a huge myth that has been all over forums that some are better for movies while others better for music and some great for both. In reality, the devices don't know, and don't really care, as long as they are not push to the limit, if they do well in movies they will do well in music. I know you are simply saying the 7015 is excellent for music (and not suggesting others are not), and that I am sure it is, but I just want to mention this as a by the way kind of comment that it is not something people need to be too concerned about when choosing their AVR.
Also worth noting that some manufacturers seem more honest in their marketing info (though still often full of BS by nature). As an example of a little honesty, quoting Anthem FAQ again: