Well, the walmart exclusive version has the most disc content, (it contains a dvd copy that the others do not) so that's the one I have. It can be a real pain to find online though, especially if you want the slipcover. But yeah, the other two special sets are the wolverine bust and then the one of him and sabretooth fighting. The bust would probably be a cooler looking display piece in my opinion, and I saw several just now on ebay. BUT, they were about 60 dollars, so I guess it just depends on how much you are willing to spend on it.
As for the quality of the bust, I don't actually have it, but I'm 99% sure it is made by sideshow collectibles, so It'll be top notch. If you get it, I doubt you'd be disappointed.
Hope this helped.
