I was looking at the 2200w as upgrade but noticed the 1200w has HDMI 2.0a inputs also. What differences do the 2 receivers have? Might be better going for the 1200w. Or would I need as much power as I can get? Don't know if the power difference would be a big factor when watching films at high volumes. My speakers are only zensor 3s so don't need that much power do they?