I went for the Yamaha Stagepas 1k and bought 2 of them. They're £1700 from Thomann or £1900 from Andertons, for 2
I guess these are a compromise, since the tops sit in the sub casing. There's connectors inside the top of the 12" sub, and the spacers ( bottom and middle of towers are spacers with electrical connectors ) and of course the very top bit has all 10 1.5" drivers plus the connectors to the spacer below it.
The top tower can sit direct on the sub, on one spacer , or on both spacers, depending on the height one wants the tops to fire at.