Welcome to BYC. Glad you decided to join our flock. Those are all good breeds you are interested in getting (Orpingtons are especially friendly and gentle), but I would personally not mix a Silkie in with those standard breeds. Being bantams, Silkies are so much smaller than the other breeds on your list that they will likely get battered by them. One breed you should really consider based on your criteria are Black Australorps. I have raised them for years and they are extremely hardy, calm and gentle (my children, and now my granddaughter made lap pets out of them), they handle confinement very well, are fairly quiet (as chickens go), and they are the best layers of the standard brown egg laying breeds. A Black Australorp holds the brown egg laying record with 364 eggs in 365 days, and while none of mine have reached that level of productivity (and likely never will), I have had a few of them lay over 300 eggs in a year. Please feel free to ask any questions you may have. We are here to help in any way we can. Whatever breeds you decide to get, good luck with your flock.