I had been using CeraVe AM, which has SPF 30, and it's okay. Now I'm doing a BB cream that has SPF 30 that I apply directly on my skin or on top of a vitamin C serum.
A friend of mine uses Mark for Goodness Face, which has SPF 30 and antioxidants. If you aren't already using a product during the day that has antioxidants, definitely consider it as its great for your skin!
I'm using the Kiehls Ultra Facial Moisturizer with Spf 15 and I don't really like it. It leaves my face way to shiny. I was using the Ole Henriksen spf face lotion before that and I think I'll go back to it once I finish this bottle.