That IronMan helmet has been discussed before. It is a very detailed file, but way too many polys, just like you said. If you didn't know already, it is actually a scan of the toy. You would probably be better off to build some of the other pep models out there and add a lot of detail yourself. I know sharkhead and ben streeper had some really good files out there. I know timecon also just finished an IronMan helmet. Check out some of his images and videos and you'll see what I mean about adding the details.