I typically don't purchase movie figures due to poor sculpt quality. Especially for Marvel Movies (with some exceptions, like the first movie Spider-Man). The X-Men figures have pretty much been terrible. Most of the Spider-Man figures aren't great, but... like you I had an itch for the Iron Man line.
Thus far, I've only purchased one. The Tony Stark w/ Snap on Armor. Not too much articulation, the Robert Downey Head sculpt is kind of wonky, the arms can only be moved just so or the shoulder pieces pop off. Also, there seems to be some kind of worthless gimmicky function with his chest and a button in the back involving a mystery piece, that I haven't quite figured out yet. (If anybody does figure this out, PLEASE let me in on it!)
All in all though, it looks pretty awesome just standing on the shelf. I'll more than likely purchase more and go from there. Next priorities: Mark 01, and Mark 03.