I love screen accuracy but some things are just not practical. Painted handguards are fantastic looking as they are what was used in the movie. However, as our suits are going to be used more than the movie suits I doubt that they will have much paint left on them after a while so will look less screen accurate. Therefore the latex look handguards are better for trooping. Same goes with the painted helmets. The paint will never stick very well to the original green khaki plasic so after a while the lid is going to look horrible.
I think SA is the way to go, epecially as Mathias pointed out when it costs no more and is no more difficult but just takes better reasearch but some things can't be exactly as seen on screen as they wouldn't hold up to what we use our armour for.
I love stormtroopers!