Things to add to the consideration list:
Praxis BC = awesome (in some ways not the best name as it is a really nice all-around alpine ski)
The DPS Wailer 105 looks to be a super sweet ski as well in this general realm - someone on TGR is looking to move an undrilled pair..
Maybe add the K2 Kung Fujas to the list.
That said, generally speaking, you can run this very general class of ski wider than a conventional ski. If you are not really truly set on that "narrower" waist width, you might also check out the Praxis Concept, DPS Wailer 112RP, S7, Obsethed, Bent Chetler, YLE, etc... From my POV, anything much under 100 makes little sense for this sort of ski (I'd put the S3 on the narrowest limit). Just my .02...
The fascination with Kastle continues to elude me. Maybe if I tried them I'd feel differently.