A civilian reader asks: Should I go to staff college or wait for war college?

A fellow BD reader, a career
Foreign Service Officer who paid some dues in Iraq, needs some career advice
from all of youse:

I'm in
the middle of searching for my next assignment, and one of my choices is a
year at a staff college. My initial preference would be Marine Corps CSC,
but there's also Army CGSC and that Joint Forces one and the AF one. Past BD
entries, as well as my impression of the Air Force, have turned me off to
the AF colleges.

If I
take a staff college offer, then I will be excluded from future
consideration for the war colleges; one of the rules of my outfit. So
my main interest is getting info on the curriculum, field trips, and
relative merits of these schools. If I pass on the staff college, I would be
able to compete for a war college spot a few years from now.