Everybody loves Buff Orpingtons. But you need some Black Penedesencas. They've been my favorite from the first ones I got. Extremely heat hardy, great foraging birds, dark eggs and very daytime predator proof - if you have a good rooster with them.
The only criticism I have looking at the pictures again is that the roofs seem to slope toward the center by the door. That could create a big mud mess during heavy rains.