I guess it would depend on how tall one wanted it to be.
Oh that is so cool.
Now, what can you come with for the N3 MTM horizontal version? 
Well, after thinking about it, you would want the tweeters at the same height, so just turn your bass stand sideways and you have a rear or front firing sub for the center channel. Way overkill, but geese three full range speakers up front for two-channel and multi-channel music...