I have been using both Mineralize Satin Finish Foundation and Studio Sculpt. They both have SPF 15. And I really like both of them.
Mineralize Foundation provides a low to medium coverage and it contains antioxidants vitamins C and E. I do have combination skin and it works perfectly to me since it control my T-zone without over-drying the rest of my face.
Studio Sculpt its a creamy gel based that provides medium to full coverage with a natural satin finish (NOT matte). Its long wearing and water resistant.
I switch between them depending on my needs and I love them both. I do recommend that you go to a M.A.C. store and talk to a Make-up artist. They will be the best to help you to pick up whats the best for you. And you will be able to try it on so you will see how it looks on your skin.
I hope I have helped you.