You took the words out of my post. I was about to post this yesterday but decided not to confuse things:
Other possibilities are the Atomic Vantage 100 cti, probably @ 180; and the Nordica Enforcer 100 at either 177 or 185 - 177 to emphasize the turniness, 185 to emphasize the powder fore and aft stability. All three skis would work for your size, I'd guess. (For reference I'm 5'10", 145 to 150 lbs. currently.)
If you like the characteristic Atomic feel (like I do), you might like the Vantage 100 as a soft snow ski part of a two ski quiver. It will carve frontside very well, but not quite like a narrower ski will. It's good in powder bumps. And it has, to me, the best snow float feel in the width class, from what I can gather. (It's in between the two extremes of floating/skimming the top and being down in/contouring well from near the bottom).
I am like you in that, to me, the most powder fun is turning, the incredible feel of turning in the stuff. To me, a straight line run in good powder is like a run almost wasted.
But with the right skis I enjoy at least three to five types of powder skiing - floating high, surfing even higher, floating "in between" almost evenly, rising and falling up and down more like a trampoline, and last, contouring almost carving near the bottom. If I had to pick just one it would be "in between" - like the Vantage 100.
With Nordica Enforcers 100, for instance, I really enjoy riding well down in the snow on powder days - because the Enforcer rides there well, playfully - almost contouring. Best I've tried at that, so far. And the Vantage 100 is more of an even, "in between" floater, somewhat down in the powder but still decidedly not as deep in it as, say, the Enforcer.
But on true turniness, esp. in trees, neither of these skis is a close to slalom-tight turner, both are naturally between slalom and gs, though they work for tighter when asked.
I have not skied the Ranger 98, but I'll bet it's quicker turning.
Edited by ski otter - 2/9/16 at 3:22pm