I think the standards have sold better based on my observations at shows. I was at a show with Jean Ribbeck recently and she sold out of large fowl immediately, and another person who brought some blue wheaten bantams did not sell as many birds.
I think when choosing a breed you need to choose what YOU like, because the success you experience will be related to the effort you put in, the passion you have for the breed, and the quality of your stock and breeding choices.
I can say this, Jean Ribbeck has some of the best buff coloring in Ameraucanas. I know the buffs aren't as advanced in egg color as some other varieties, but if you're looking for a variety to continue working to improve that's already come a significant way, see if you can't get some of her buffs.
If you want a big bird with good egg coloring, Jean's whites are just gorgeous and lay LARGE eggs and have vigorous chicks.
I don't know the lines of other breeders, but I know Jean Ribbeck of Pips and Peeps has the passion, the knowledge, and the quality of stock that makes for an ideal person to buy from and learn from. I am certain that if you contact her she would be glad to talk ameraucanas with you.