OK. I've been doing research on and off all day. Let me run it by you all. It sounds like Khakis, Runners and Welsh Harlequins are the best layers, and I'd love any of them, but are all too small to house with my Pekin and Crested. It sounds like Rouens are a good size and personable but are poor layers. Anconas are probably also too small. So now I'm considering the following: Buff Orpingtons, Swedish, Cayugas and Pekins. Also, what about Muscovies? Can you respond giving pointers as to laying, personality, broodiness, loudness and likelihood of doing well in the cold winter housed with 2 Pekins.
Thanks so much! Couldn't do it without your help!