I agree with the statement from "qcanoe".
I've lived and skied in Pennsylvania, Mass, Vermont and NH all my life and 90% of the time in the East you will be skiing on Hardpacked powder, ice and groomed choppy crap, that is the nature of the NorthEast, period. If your lucky enough to hit a powder day, then fine, but it will still be heavy, wet powder in the east. If you primarily ski in the NE then you don't need a 50/50 ski, mid-fat or powder ski. I ski my Atomic GS race ski's in all conditions in the East with no issues. Out west, in powder over 4" deep, they are totally useless, so I take my AFT Sugar Daddies, since I'm 80% off Piste out there. I'm out there about 30 days total during the season since I have relatives in Colorado, so the powder ski's were a good investment for me.
When you go out west, RENT, if it's only 4-8 days a year. It costs you $25 a bag now on all the rapist airlines except for SouthWest. A good rental shop will offer a demo package for around $85, where you can try a different ski each day if you want.