Hi and welcome to the club! Nice looking birds!
Bad news- all three are males.. those are saddle feathers and also roo sickle feathers in tail on that red one.
Which one to keep depends on what your goals are. Everyone has different tastes and goals.
My observations: the red one seems closest to the show standard type. Is he meatier or heavy for his size He seems either meaty(which is great for dual purpose breeding) or it;s just his feathers are long making him look heavy. His color is probably the most common color from hatchery NN stock. He is not pure for the naked neck gene.
Second one: pure for NN. can't tell if he is truly bare necked or has a tiny bowtie with feathers missing/broken off(pretty common thing to happen, don't worry). True total bare necks, right from hatch- zero down on neck are uncommon, especially from hatchery stock. I would recommend this one if it's a true bare neck and want more of it, you will be hard pressed to find another, especially in dual/LF size. He has the breeding advantage of throwing 100% NN chicks, even if the hens are not naked necked(the chicks out of those would have the large bowties like the other two). His color is also rather uncommon for hatchery stock. So if you like the black and white color, he would be the one to keep for sure as Silver is a dominant gene. He might be half silver half gold- which would mean he produces chicks in a wide range of colors and patterns.
Third one: I just think he has a pleasing type. Chances are he will turn out to be a very nice looking roo. Not pure for NN- him and the red one will throw half NN half not NN if bred with non-NN hens. at least half of his chicks will grow up black/brown or black/white in similar pattern.
Not an easy choice... if it's not absolutely necessary to cull down to one roo, would be great to keep two or even three if there are enough hens.
