I really thought those would be 195s considering how much taller than you they look. I'm a little afraid of what my 191 Lhasas will be like now, as I'm still smaller than you.
It's not always chest-deep blower, but you just said that these are dedicated powder skis, so why not prepare for it! Although I have no actual knowledge on the matter, I bet the FKS can fit a touring sole. I'm sure the folks over at TGR would be able to answer that question, too.
By the way, DEFINITELY do not buy any S6s unless you see them in person. If you haven't already, go check out the thread on TGR on them. Rossi seriously messed up the rocker such that there is a contact point under foot and in the tip and the tail, creating 2 separate sections of camber.