So far i like everything I hear in the trailers especially the Escape trailer. If you skip to the end when when the title sequence comes in and slow it down, it has a very creepy droning sound which I would love for the game.
Modern,suspensful experimental and droning single notes is always good for the Aliens franchise (kind of like the original 'alarm' you hear in the Aliens and prometheus trailer.
Frankly if they went with the original 'marine' army drum solo thing it would have been way to campy (as campy as it sounded like in the movie). I do however expect the army solo thing to happen at some point in the game (ie, recapping a story or a introduction to a character).