Well, I went ahead and bought the LORAC Pro Palette. I also own many Urban Decay shadows as well as my Stila Palette and my many, many MAC individual shadows. I have found that LORAC, UD and Stila all have similar, very buttery awesome formulations. But I recently went back to using MAC because my poor MAC shadows had gone neglected for too long. I fell back in love with MAC.
They are, for me anyway, somewhat easier to work with because they aren't so soft and buttery. Plus the huge color selection is great. I also have a couple of Dior Quints and love those as well. But Urban Decay, there's something about their eye shadows. Love all my shadows. My LORAC, my Stila, theBALM, MAC and even Lancome makes a good shadow. But I think at the end of the day, due to the huge color selection and the formulation, MAC wins. I still usually choose one of the others over MAC, but when I use MAC, I am reminded why I fell in love with them in the first place. Let's face it. I just love makeup. It makes me happy. And palettes are great for travel.