Does your insurance have a preference on hospitals? (for example, my insurance will only cover IHC hospitals) I think financially it's wise to stay in your preferred network. That said, I've heard great things about St. Marks and I just had a family member deliver at the new IHC in Murray. There were some complications and they just raved about the quality of doctors and care there.
Personally, I've delivered at Jordan Valley (part of the Mountain Star hospital network and saw Dr. Kimberly Moreland at South Valley Womens Center and loved her) and I thought the staff and facilities were nice but the food was lousy. I also delivered at Alta View (part of IHC hospitals and saw Dr Kathryn Walker) and also thought the staff was nice. I wasn't in the LDR suite long so I can't really say if it was comfortable or not, but the post-partum room was very nice and the food was good for hospital food. Both doctors offices were at the hospitals which was nice.
I've had family deliver at LDS and SL Regional and both didn't care for the hospital or the rooms (but that was several years ago and I don't know if they've done upgrades or remodels).
I hope you find someone who you like and can deliver at the hospital you want.