Alien (1979)
Planet of the Apes (1968)
Close Encounters of the Third Kind (1977)
The Invisible Man (1933)
King Kong (1933)
Haven't seen The Island Earth but it looks interesting from the clip you posted and the imdb write up, might check it out if i can find it somewhere. Some of those older flicks have an old fashioned sensibility about them but themes and story are far more interesting than some of the crap churned out today thats for sure...