Which UT resort has the best powder steeps and bowls? Second best?

My personal opinion is that the 4 resorts in Big and Little Cottonwood canyons are the best, and all have awesome powder. Solitude and Brighton are in Big Cottonwood Canyon. Brighton in my opinion has a smaller feel to it, not in size, but less commercial than the others.

Alta and Snowbird are in Little Cottonwood Canyon and are my 2 favorites, which is why we picked up from Chicago and moved here last year :-)

If you ski, Alta is an excellent choice, as it is a ski only mountain, no boards. Snowbird has an awesome bowl on the backside.

My advice to you would be to rent a house or condo in Sandy, and hit each of the 4 resorts while you are here. We did this for many years before finally moving here.

All 4 resorts are so well matched, that we still haven't chosen a favorite to buy a seasons pass at, although I did buy a 10 pass at Snowbird.

As for other resorts in northern Utah, the resorts in Park City have a way over commercialized feel to them, and the runs don't feel as steep to me. Snowbasin and Sundance are smaller and have just ok skiing.