Neca's been improving in terms of build quality I've heard, though I haven't been in this game long enough to know by how much. I have that Robocop you mentioned and it's been fine so far.
I know that there's one based on the first movie, a battle damaged one, a RoboCop 3 figure, and then the video game ones.
Oh, yeah, I used to have these RoboCop: The Series figures as a kid. I used to play with them a lot.