powder mountain is pretty big i hear.
alta and snowbird are good, but since i am going there flyin out in 9 days i am obligated to tell you those places suck, and you shouldn't track out any snow there.
in all honesty my 4 ski day trip will probably be spent at powder mountain (haven''t been there, it sounds huge, and less busy), alta, snowbird.....and I will probably go to a park city resort (not sure which one, maybe deer valley...hell people say the place doesn't get tracked out). and I also have heard there are $15 cat rides to the top of some pretty good terrain at powder mountain as well so I might be encouraged to check that out when I am out there. because a cat ride anywhere else puts you in triple digit prices. don't forget night skiing at brighton also if you want some skiing at night.
i can't wait to see what the coverage is like at the end of feb vs. end of december.
have fun though. i think mineral basin / road to provo (at snowbird) is one of the top 10 moment for of my trip out in utah in terms of finding bowls (at the time full of powder) with just tons of great powder.