For showing, not all breeds are recognized and have classes. If showing (and winning) is important, the will play into the breed selection process. I don't show (anymore, I did in 4-H), so may not be the best to advise you.They like pretty much anything LF and things that are different (not as common). I prefer something that is a decent egglayer, so it can help pay for itself, lol. Something on the docile side like their Cochins.
Do you have an incubator to hatch eggs you might buy, or are you looking for chicks?