How many are there, and which characters are they? I know MP01 is Prime, MP03 is SS, and MP05 is Megatron...are there more or is that all? Also, of the three which would you most recommend? I was thinking SS since he's my favorite G1 character (and most likely overall favorite), but what with the upcoming US release of him in G1 colors (which actually work on this mold..unlike movie SS) I'm not really sure. I've heard both good and bad on Megs (the transformation being a big problem from what I've heard). Prime..eh I dunno Also, what exactly is the Masterpiece line? I know they have diecast parts (sorta) and are for the most part really good representations, but why so expensive?