On a decent day at Whistler, look what is on the feet of the people you realistically aspire to ski like. Since I have ESP, I'll tell you what you will see many of.
Bent Chetlers (maybe some Blogs too)
And an assortment of Priors (Overlords and Dough Boys), Katanas, 4FRNT EHPs, etc. Maybe some new goats. While you will not see a ton, the DPS 112 RPs as well as Praxis BCs and Concepts land in this design and use space as well. Next year you also will see Salomon Rocker 2s. And very likely a decent number of Volkl Shiros.
You will also see some fatter skis that - based on what you said - may be less likely to be what you are looking for, but will actually do pretty well on most of the mountain(s) (the return from the glacier excepted ). This would include Pontoons, Hell Bents, ARGs, Kuros, and the odd DPS Lotus 138, or Praxis Powder Board or Protest that has found its way north...
These skis personify the genre you should be looking at. Given the nature of PNW snow and the terrain you want to ski, I would not consider anything less than 105 wise or lacking tip+tail rocker and some form of early taper. In fact, I'd focus on skis north of 110 wide. And as noted by others, something in the general design space above that is not too stiff - although stiffness may be less important than the overall design.
Having said that, the old goats are pretty nice skis. Great skis for their day. And there are plenty still out there. However, if you are going to throw down $$ for a set of skis aimed at PNW off piste skiing today, you might think about the impact getting the more modern designs will likely have on your progress. Next decent day, ride Jersey Cream early on and watch the show on the right near the top of the lift. Keep score in your head of who is having an decent time (even if not a stylish one) vs who is doing headers & digging for skis. I'll bet you a beer that the vast majority of people diving their tips, digging (excluding folks who have hucked their meat off the cliffs & imploded), etc. are on more traditional narrower skis. There's a message there.
Oh yeah - 168 would probably be short for you in any generation of the goat.