Organic Protein Powder Questions

My bf is wanting to switch protein powders (and I am curious too). We'd like to switch to something organic, chemical free. He currently uses Real Gains in Chocolate Ice Cream flavor. I use Matrix 5.0 in Cookies n' Cream.

Suggestions on what to look into and what brands to avoid would be helpful. What do you use? What did you try and hate? What has the best flavors?

I'm going for lower calorie options as I am trying to lose weight. He's going for higher calorie options as he's lifting.