Alias and 24, you are ambitious, but I like the combination.
For a way to fill out your miniatures collection try Heroclix figures. You can find a variety of modernish/,militaryish figs amongst the superheros. Clix figs are also very easy to do minor conversions. For someone like Sydney, who wears a different outfit every turn, clix figs can provide a way to make several versions of the same character.
Just a thought.