Before you go out and spend $18 on it (probably $12, really -- I think that they're all Price Savers or whatever), you might want to find a friend who has something of theirs and listen to it. It's definitely not for everyone (though I love them), and I don't think we know your tastes. Regardless, I'd tend to agree with the other suggestions, but Trompe Le Monde might be a little more accessible to the virgin ear.

It's not as bad as telling someone that Zen Arcade is Husker Du's best album, though.