This is a tough call. Ideally I think one partner should work and one take care of the children. But, if both must work, the best thing would be for them to be in the same profession where they have a similar passion--that would be best for the marriage, by far.
One thing to note is that women seem to be more sensitive to work overload than men. They are much more susceptible to clinical depression, a diminished sex drive, and stress-related illness than men, at least married men.
I myself would have no problem with either a housewife or a wife who is passionate about her job (meaning she loves doing it for the sake of doing it), but I would hope my income could cover us both.