Who should I start Week 1 out of these 3 receivers?

I would start Anthony gonzalez. I look for the colts to spread out the Bears D creating some awesome mismatches for the Gonzalez. Linebackers are going to be forced to cover him and i dont see that working out well for the Bears D. For your other dilemma, i would go with Larry Johnson. Just because he is the more proven player. They both are going against some crazy good Defenses and DeAngelo could lose some goal line carries to Jonathan Stewart. Good luck.