We hardly ever get powder snow on the West Coast. What's powder snow?--if it'll form into a snowball, it ain't powder. Sierra Cement, Cascade Concrete, just wet white glop--you get the idea. And sometimes we get Cascade Clear Flake, often misidentified as rain.
Do rent demo skis. If there are only a few days of fresh snow you'll be in each year, renting is a money saver. There is no ski good in both fresh deep snow and packed snow, especially hard pack. When you find the skis you like on both fresh and crud, then maybe consider buying.
Here's a few tips for deep snow--
--Keep both feet close together
--Equal weight on both feet all the time
--Center your weight. On a straight run in deep snow, move your feet forward and back a bit to find the balance point your ski like, then always return to that "centered" position in your skiing. Sit back only to briefly ski up on a hump or rise, then immediately recenter. Also sit back when the snow is so wet and sticky that this is the only way you'll reach the bottom.
--Visualize an airplane banking in a turn in the sky. Visualize your skis down in the snow, on edge, both together, banking in a turn. Learn counter & angulation to facilitate edging the skis. I edge/angulate/counter to make the turn, then just relax both legs and let the skis float and flatten, then edge/angulate/counter the other way. It's that easy.
--If you're in the habit of skidding your skis sideways, well, that can work in dry snow with the very wide and very rockered skis that can make smear turns. In heavy wet stuff--not so well.