Azrael wrotei've only played like 2 minutes of Luigi in a store, but i bet it's not as cool as Viewtiful Joe (the first one, mind you, i haven't played 2 yet).
LOL. Well, it's hard to be as cool as Viewtiful Joe. That's one game I definitely have to pick up in the near future (may be in a couple months?).
Anyway, as I said, if you can find Luigi's Mansion for cheap, go for it. It's a very original game, and it's certainly a lot of fun. Just don't expect anything Final Fantasy X or Devil May Cry quality.