Hi Mark I think you will be pretty safe on the sound side until you take the cat out with a link pipe. You could take the standard exhaust of and listen I fitted an Ixel today and started up in garage and it was only a deeper sound that's all quite comfortable standing there.
https://www.790dukeforum.com/forum/570-790-duke-exhaust-headers/406-ixile-m2.html
https://www.790dukeforum.com/forum/570-790-duke-exhaust-headers/406-ixile-m2.html