If you're a true believe, you're better off concentrating. You'll be able to show employers in that field that you have an advanced understanding of the subject, and a dedication to the field.
If you're not positive, then take the "bar classes" and maybe a few extras in one or two fields you think you're interested in.
Personally, I'm splitting the difference, taking a decent course load in trust/estate/property type classes, and then a generous number of generic classes.