The only version of Bumblebee I bought was Cliffjumper. I like the Classic Camaro vehicle mode, but I thought the bot mode looked like junk, so I didnt bite. As for the Concept one, it has a very aesthetically pleasing bot mode, and the transformation is somewhat interesting. The bot mode isnt THAT posable though. The arms are fine, but the legs kinda stink. The knees have very little range of motion, and no thigh swivel. He's awesome for display though. Seeing as you already have so many versions of the mold in hand, it couldnt hurt to open one of them.