We are also a family of six and stayed in a family suite at Music on our last trip and really liked it. Some of the features that we really liked include the space and layout, the living room has three pull out bed options so our two oldest kids didn't have to share a bed with anyone, the kitchenette is in its own separate hallway like area, and the Music suites are located in the buildings closest to the food court and bus stop. The buses at Music ran good during our trip., Music usually had its own dedicated bus and we only shared with the other All Stars a few times during our trip which were during the least busiest times of the day; but the All Stars are all right next to each other (within easy walking distance) so bus sharing really isn't a big deal time wise. We wanted to try AOA for our upcoming trip but DH said the extra $456 it would cost for us to stay there could be used for other things. Also, my DD11 detests the idea of sharing a bed with anyone so that would be an issue for us if we stayed at AOA. I really wanted to stay there while my kids were all still young enough to enjoy the theming and since it is a new family suite option at the value resort pricing level. I prefer a family suite over getting two regular rooms, but our goal is to have a new resort experience for this trip which is why we didn't book the Music suite again.
OP, if all your kids don't mind sharing beds and the price difference isn't an issue then I would go for AOA. AOA is still a possibility for us though. I am still trying to convince DH that the extra $456 is worth it! We probably won't be back to Disney for 2-3 more years so with our kids ages now would definitely be the time to stay there. We just might have to bring an air mattress for DD11!