Orc actually isn't too bad of a color, if you match it with a set. Same goes for gladiator. I'd choose orc though. It makes for a stronger looking set.
They could, but it depends with the other colors you have with it. Like you you have like vamp+giga gradients with marine force and orc realx. Then, yeah, it would look pretty messy. But if you have a good texture set with it you can make any color (cheap or expensive) look good.
If it costed 10k - 20k more, had a higher Qi around 2000, and was brought out tomorrow with a name like Dark Ogre or something, people would go crazy for it. The only reason nobody likes it is because it's cheap and has been around forever.