Ok, I hate to say this..but I feel I must...
I fail to see the point of listening to very large speaker systems that have little to no chance of working in one's room??
The quickest way to disappointment in our hobby is to try and jam a speaker that is too large for the listening room ( or doesn't play nice in it for whatever reason) into our available listening space.
. . .
Perhaps, it might be an idea to start with a smaller speaker, one that will more likely work with one's room... and one that can be easily demonstrated in one's room and slowly work up to the larger
speaker....but with home demonstration as the paramount, before investing in that mega speaker....one that sounds great in the dealer/manufacturer demo at their locale, but sounds far less stellar in your smaller room.
All IMHO...