The Machine Wars set is awesome! The only 'complete' line I have of anything is MonsterArts Kou Kyou Kyouku Godzilla line. It had ONE entry before being cancelled. I got it on clearance.
Too bad, too, the lights, sounds, and music playing features in an action figure form were awesome, and being a bit taller than normal MonsterArts, it became my 'scale' when making my Monster Shelf. Here's an example of me ignoring that scale, much like Godzilla and Transformers have done throughout the franchise.