Sounds like a generally good idea. But you might lose some chickens--one dies in the mail, one gets squished by a careless child, a dog gets one... So just be aware of that possibility. Personally, I'd probably get 12-15 at first (partly because of hatchery minimum orders).
If you're open to the possibility of eating them later,you can eat the least-favorite few each year, and get a few new ones.
Breed choices: I have a personal bias against feathered feet (Brahmas, Cochins, Faverolles.) But I do know that many other people love those breeds. In general, I think that's a good list.
Other kinds I would consider: sexlinks (black and red/gold) and a White Leghorn. They tend to lay really well, and are all fairly nice birds. Yes, the sexlink have a reputation for being short-lived, but they reliably lay well in their first year, and some do continue to live and lay for quite a while. Yes, Leghorns tend to be more flighty than the breeds you listed, but some people really like them. A few white eggs look nice in the mix, and a single white chicken looks really pretty in a flock of colored birds.