Even though I like the green and blue tunic (zora tunic) I think the black tunic ( dark link tunic)is the best looking one if you could wear with using an action replay or other cheat codes.
Green Tunic hands down. It fits Link best. I really like Link in his traditional green. And, Link has always had green clothes in every game, so I wanna stuck with them. It's good just because it is, there is no need for special abilities to become good. =D