I am 52 160 pounds and ski 5 to 6 times a year. I ski the blues mostly. Don't go off trail. I have a ski with a 72 waste. Ski Tahoe area mostly. I am looking for a ski for powder days. Any suggestions? Thinking of something in the 80 to 90 waist range.
looking for intermediate all mountain ski
Go to Ski Mag gear review and check out the "mixed snow" section of skis. You'll want one that is a little more intermediate friendly. If you ski Tahoe and like powder days go for a easy turner between 90 & 100 rather than 80 to 90. I'm 51, 145 lbs but ski expert and my ski of choice is the Volkl Mantra. For me it's a great all-around one quiver ski with a traditional camber, which I still prefer. It's a great ski but might be a little stiff so look at the new Volkl Kendo (ok, I'll admit it, I'm still a Volkl fan). Other skis with a traditional camber you might want to check out are the Kastle.
If you're skiing the blues, the rocker isn't that important. You would do fine with a traditional camber. As far as moving around all that width, no problem at all. It's a little more work in the bumps but I would never choose a ski below 90 again for western skiing. Besides you stated you wanted something to help you in the powder and narrower than 90 just won't cut it as well.