Welcome to the site! I never liked black because it shows every bit of dust and dirt. It only looks good when it's clean. As far as the other 2 choices, I have the stone in my wife's Edge, and the camel in my Superduty. I really like both. The stone is a nice color becuse it's like a blend between a tan and grey color. If you're not a fan of tan interior than obviously stone's the way to go. But I had grey in my last truck so I wanted something different, so I went with camel. But I really wish they still offered the denim blue! Don't know if my rambling helped, but it might of gave you a different perspective.
-Funkster-