Forget the talk about Metallica - the game just isn't very good, IMHO.
I own a STLE, and I like it, but I have to say I don't love it. It's fast and there is nice flow, but the rules just aren't very deep at this point. I keep hope that the Karl Urban update will fix that, but so far it's MIA. To be honest, if you like the layout of ST, Spider-Man is similar, but is an overall better game.
Iron Man took some time to grow on me, but I really like it. It's not fancy, and the toys look cheap, but the flow is great, and getting to high-scoring modes is very challenging. Right now, if I had to choose, I would choose Iron Man.
That said, for NIB right now, there is no better choice than a AC/DC Luci.