Manning/Britt for Romo and C. Johnson
Unless you mean "Chad Johnson" with the C, there is no bizarro universe that I can think of where this trade is worth considering. That's a terrible trade, and you take on the risk of Peyton's neck. I would try to swing Romo and Martin for Lynch and Cutler. Go with RG3 as your main guy, he will get stats every week, no doubt about it.