I'm not a big fan of the X bases on the LS6 either. I think that I might add some crown moulding to the top, and do a similar treatment on the bottom.
I also was thinking, maybe the base should be higher. It seems like some of the reason people like the LS9's more, is that tall people don't get the full effect when standing. It's not a problem for me, but with the speakers starting below my knees, why not raise them a little just for the pleasure of my taller guests?
Any thoughts?