I'm going to be a brat. I've never had orpingtons but I do have 2 RIR's. Keep the RIR's. But why the decision to part with 2? In the long run, 2 more really doesn't make much of a difference over all. I couldn't part with any of mine. Not even crabbie Abbie. She's too great for entertainment when she plays with our dog. Besides, I know deep down in that ornery little heart of hers that she loves me.