They are almost identical to a design I'm working on for a friend. I liked the originals*, and wide baffle speakers but needed more internal volume so I went with the deeper, 'gem' (in cross section) design. Still sorting out the MR driver selection as I think I can better the protos. His will...
Then you have your answer; don't buy any. You have a number of misconceptions about size and bass amount and level that I know that without hearing a really good large system, no written argument is going to convince you.
Find what you want and enjoy.