I'd suggest MyPetChicken, they have sexed silkies- Females, males, and straight run. If I'm not mistaken, their the only hatchery in the US selling sexed bantams. They have white, buff, blue, partridge, black, and assorted silkies.
If you get turkeys, I'm pretty sure you can't keep them with chickens. I've never had turkeys but I've read that unless you put medication in their water they can get something called black head disease.