Help for selecting seminar/course in security!

Hello guys and girls , I want some help!
I am to visit washington dc for a month...and I am interested in attending a security course (probably CCSP)...I have CCNA and would like to widen my knowledge to the sector of security...What would you advice me to do?Is CCSP a good cert?is it worth?Moreover , do you know any companies that organise those courses?and which are the best?thank you!