@Kacey Elle , If I understand you correctly, you only want to make one trip and get only one group of 6 chicks. If I was looking at choosing from only one of those lists, I would choose from the first list. My choices would be:
Ameraucana (which will actually be Easter eggers): Quirky personalities, never aggressive IME, lay a variety of colored eggs, most likely blue/green or Aqua, though you may end up with the occasional brown or pinkish brown egg layer. Much variety in their feather coloring.
Plymouth Barred Rock: Good all round layer of nice large eggs. I love their coloring.
Black Australorpe: Have a lovely beetle green sheen to their feathers. Also have a good reputation as a good layer with good production. My BA lay a nice large egg.
I would absolutely avoid RIR and Red Stars. Wyandottes are great eye candy, though IME, they are not quite as productive as my first 3 choices.
Speckled Sussex is enjoyed by a lot of folks, though I've never had one. I've heard that they are wonderful birds with great personalities, and also heard that they are horribly loud.
B/C birds of a feather tend to flock together, I'd choose 3 each of 2 breeds, or 2 each of 3 breeds.