I love Laph CS - but also love Laga16. I drink a lot more Laphroaig, however, because of the price... and there's times I want that briny, smokey kick in the teeth from the CS.
Other times the elegance and power of Lagavulin is all I want!
Cost is a factor, but mood is a bigger factor.
That said, I'd take Laga 12 CS over any of them at any time!