CISM or ISSMP

in CISSP
Hi,
I've completed the CISSP and was thinking what to do next.
Now when I look at job adverts, nearly always I see CISSP or CISM wanted. In fact I haven't seen anything for ISSMP.
But do I even need CISM?
Ideally along the way I'd like the chance to become CISO...as does a friend of mine in the same predicament.
Should I bother with either of these and if so, which one would be best?
ISC2 CISSP, EC-Council CEH, CompTia Security+
Comments
CISSP | CISM | CISA | CASP | SSCP | Sec+ | Net+ | A+