You have the option of looking legit or not, but it's not about looking legit. Its about actually being able to use the hacks.
Kinky is great overall, Huzuni for pure PvP, Gemini for speed fly and kill aura (if you know how to modify it)
WeepCraft has ALL of the features you mentioned in your post, but I'm not sure about the .stp thing. WeepCraft has everything you said and two kinds of Kill Auras, one that makes you look legit and faces the person you're attacking, and one that automatically hits everything around you without looking at it. I think people don't like to use WeepCraft because it's more of an "advanced" client with MANY features. Some people also say that it can be more resource intensive than other clients, but the latest update makes it much less intensive. From the list I've seen on WeepCraft and Huzuni, WeepCraft has most if not all the features of Huzuni and about 75+ more features. If you're like me and paid $5 for WeepCraft VIP, you even get 10+ more unique features.
The new update, with .stp, allows you to teleport to spawn immediately (on Huzuni). This can be very helpful (and unfair) to players, and Weepcraft does not have this feature, I believe.