What additional qualities (not capabilities, e.g Trifield) do centre speakers provide aver a stereo pair? The discussion talks about needing to match the centre to the fronts when, in most domestic cases, there will be a compromise, meaning a horizontal centre with the front tweeters being at different levels.

Are we getting better wrap-around sound because we can move our FL & FR further apart but then need to fill in the middle?

I would welcome views on these front set-up alternatives (all with two rears and no subwoofer):

(1) DSP5200 L&R plus DSP5200HC vs. DSP7200 L&R (min separation FL-to-FR = 160, max = 260cm)

(2) DSP7200 L&R plus DSP5500HC vs. DSP8000 L&R (min separation FL-to-FR = 210, max = 300cm)

In the spirit of Spinaltap, I would like to confirm that I am not involved in the corrupt theft of a global sport.