((Profession Paths))?

Im having some difficulty deciding what career path to choose. I want to work for the government in professions such as law enforcement officer, army officer, swat officer, marine, officer, armed security specialist, ect. Right now im deciding between 8 years in the army then becoming an NSA (National Security Agency) police officer, then to S.W.A.T (Special Weapons and Tactics), then eventually to the F.B.I (Federal Bureau of Investigation) or becoming an NSA police officer for about 8 years or more, then S.W.A.T, then DEA (Drug Enforcement Agency), then F.B.I. I don't know which is better for me. They all involve careers that I want. In your opinion what is better.