QFT. On Mt. Hood at least, in any ski category other than purely on-piste, you may as well just buy the best crud buster of the bunch, because that's what you'll be skiing after 10:15 AM.
@James, I hear you on carrying "pulling" tips too far when it comes to hard pack skis. I actually prefer the slightly less wide tip on my GT84s over the Titans, which I never thought would be the case.
But I don't generally see that problem in wider skis, and I think those have kind of been "dumbed down" for skidders and heel pushers -- not that they aren't out there having a blast, too! NOTABLE EXCEPTION: Fischer Pro Mtn 95, which I just haven't been able to ski yet.
While I know there is more to a ski than just it's dimensions, my favorite wider skis seem to have tip to waist deltas of ~35 and tail to waist deltas of ~25. YMMV.