You mention that you live in Arizona and the sun can affect hair color a great deal, so I want to address that first because I think you'll love this product recommendation. Try the Biolage Earthtones. Earthtones are a line of Color Refreshing Conditioners that deposit beautiful, rich tonality back into your hair. The richer your hair color looks, the healthier your curls will look. The colors I suggest for you is mixing Natural Brown with Light Gold. Apply it to your hair directly after shampooing and leave in for about 2-5 minutes depending on your desired intensity, then rinse. Also in the Biolage Earthtones collection is Copper, True Red, and Violet.

Here's the difference between Biolage Curl Defining Creme and Contouring Milk. Biolage Curl Defining Creme is one of Biolage's "touchable soft stylers" which will give your curls definition, moisture and conditioning benefits, and very soft effects. Contouring Milk will offer the same benefits . Contouring Milk contains ultra light styling waxes and silicones for extra control and also help to boost body into your fine hair. You can use both products on wet hair and add more for extra definition when your hair is dry. They are both light and will not weigh your hair down. Because of the environment in Arizona, I suggest the Contouring Milk because it will give a bit more control.

While (and if) you are diffuse drying or air drying your hair, I also recommend the Amplify Spray Gel. This Spray Gel is like no other. Because it is a member of the Amplify Volumizing System, it will plump and bodify your hair and offer a bit more firmness and control to your curls.

For smooth hair days, try the Amplify Gel-Wax. The built in wax will give great maneuver-ability during blow-drying as well as frizz control. The built in gel will assist in giving your hair wonderful root lift, control, and holding power.