Mastro's, CUT, or STK? Looking for best steak in LA

I'm graduating next month and looking for somewhere special to celebrate over dinner with my family. I'd like to go to a steakhouse. The most important thing is the quality and taste of the food. I would also like somewhere with a good atmosphere. Price does not matter and I'll go anywhere in the general LA area. From what I've read, I'm leaning towards Mastro's or CUT, but I haven't heard much about STK. Any opinions on STK compared to the others? A lot of the threads for this topic are a couple years old, not sure if opinions have changed. I don't want to go to Morton's or Ruth's Chris, I've been to those many times. So - recommendations for the best steak in LA? Thank you in advance!