Does anybody have experience with Capilene?

Hello, I am trying to decide between the Patagonia Capilene base layer 2 and 3. I am worried I will be too warm in the 3 and not warm enough in the 2. I will be using this for backpacking trips in So. Cal. as well as a thru-hike next year. Does anybody have any experience with them and can shed some light on their warmth? Thanks Josh