WillskiforfreeAlta and snowbird are the best , only downgrade is that snowbird is only open on weekends, but it's cool because if you get a pass to snowbird tickets to alta are way cheap or I believe you can get a combined pass.
lolno, Snowbird is only closed on week days for like the last two weeks that it is open, which are after every other ski area in Utah is closed entirely.
Seconding Grizzly's recommendation for Jackson, it's on the same level as Snowbird, two of the best ski areas anywhere.
Also know that Snowbird, Alta, and Jackson Hole are more challenging mountains than pretty much any other ski area. OP, you say that you like to ski pow, so I assume you have skied in the mountains before, in which case those three are excellent areas--as long as you are comfortable on steep off-piste terrain. They are not like Colorado resorts where any gaper kid can go and ski easy groomers all day. They have a fair amount of groomers, but the groomers are not as well maintained as more family-oriented places so they get pretty choppy, and Snowbird/Alta/Jackson also have steeper terrain in general than most other ski areas. If you and your brother are good skiers they are pretty much your three best options, but if you are casuals/beginners you may want to consider other places.