I'll grab oilslick if I can find him cheap. Since animated toys are relatively recent and somewhat dissapointing I'm not going to be in a hurry for him.
On another note I got Swindle for my 8yo cousin. He seems a lot more solid than prowly but there was a bit of irrational spalling of the forarm/hood pieces. I have to say modern transformers are pretty good training for children. I could hear the neurons interfacing in his brain.