The 6200 is 105W/Ch against the 5200's 85W/Ch but apart from this they are the same except for Circle Surround on the 6200. Would this extra power really make any difference to the performance? I am using the Tannoy R3 series - 2 fronts, 1 centre and 2 rears. I don't yet have the centre rear or a sub yet but am planning to get them soon. So what about the extra 20W/Ch?