I think you would hear an improvement. I was expecting to take a big hit in SQ when I bought the 975 for the move from two channel to the 3.1 system currently in place. For 90% of my use I find the 975 to be an improvement. Tony has said similar things after replacing a Rotel unit with the 975.

Unless you feel the need for an Atmos/DTS unit the 976 should be solid choice performance wise at a great price point. Outlaw's customer service is the icing on the cake.