You're in for a treat. I have both WM Special Version and Mark II and have to say I really love both designs (though the original is no doubt the stronger of the two). I'd be happy if HT re-releases it in diecast, just so I can get the gun metal version.
In a perfect world, I'd have all versions! I just started picking up the Iron Man stuff about a year ago, so I'm a bit behind. That means some of the older stuff, like this one, is a tad pricey. This was one of my must-haves though. I just finished unpacking it, telling my almost 3 year-old the entire time, "No, this is daddy's toy. Don't touch!"