Hmm...now that you mention wanting to ski trees and powder, and the waist width you are looking for, have you looked into the Moment ski lineup? I personally have only tried (and ended up purchasing after demoing several others) the Moment Sierras. They are 95 underfoot in my length (162), and are designed to be all mountain and work well for me in bumps, off-piste, and trees, but excel in chasing powder while remaining nimble. They aren't the best ski for hard charging or carving groomers--they are still on the wider side underfoot. But personally they suit me so well I find myself carving better on them than I did on many other skis. And if you are wanting to chase powder and go for a more playful and exploratory style of skiing, they sound like they might be along the lines of what you could consider. They are the women's version of the Moment Deathwish, and have been around a long time, and are very beloved by those who enjoy them, myself included. But they are a bit different than the Secrets and the Santa Ana in shape and rocker design, though they have a similar, slightly narrower waist underfoot, so this suggestion is based more off of what you said you want to start skiing and exploring rather than suggesting a similar ski to what you are already looking at.