I am in the process of buying a new 4k tv (lg oled) My current receiver is non 4k so I need to upgrade,currently my onkyo is driving 5.1 eggs 3000 egg speakers. The power output of the marantz (50w) is less than my current receiver (80w) Will I notice a huge difference? Reason i am looking at the marantz is due to its smaller size. My onkyo is a tight fit into my cabinet as I am little concerned about air flow ad it does get hot. Any thoughts or recommendations on a 4k receiver to fit in a aperture of 19cm. I won't be using dolby atmos as i can't route wires to the ceiling as far too much effort involved.