Both look like a must watch to me.
The Enemy's Gate is Down
Remains my #1 favourite book of all time and is one of the few paperbacks I still have.
If it's the space war element you like (and not the little boys doing the jobs of men), you should read 'The Forever War' if you haven't already. If 'Shadow of the Giant' is Bean's novel, this would be Mazer Rackman's.
While we're on the subject of iconic sci-fi books turning into movies, can we all agree that it's a crime against humanity that "Snow Crash" isn't a movie yet?
Elysium looks promising….
Eff ya it does!
I haven't read fiction since about 1989…so I get to judge movies at face value :)