Agreed for the most parts smile Most video streaming service only provide either 5.1 or 5.1.4. Even though I have some local content with 7.1, but they are 1080p. To enjoy 4K, I have to go with the streaming content. In that context, my current 7.1 has less and less advantage over the 5.1. So a painless upgrade with least cost would be to change the 7.1 to 5.1.2, leveraging existing cabling for the top height speakers and getting a 7.1 4K receiver.