I DO like the new TNS Essential Serum (by SkinMedica) which is a "double pump" combination product with antioxidants, cell growth factors and peptides combined. It's really expensive but worth it if you have a lot of sun damage or are over 45ish.

A very nice antioxidant for those of you with sensitive skins (who don't tolerate Vitamin C serums well) is the Replenix Cream (90% polyphenol isolates) - works but not irritating.