55C Load, thats a problem? My 6800 GT is 60C at idle, and thats a good temp.
Blowing the fan into the case is not always good. With an open case your temps might actually be alot lower, than with a big fan, as it might mess up the airflow. My cpu temp went from 51C to 45C full load when I opened the case, and then back up to 48C when I blew a fan into it. I might make a guide about it since so many peopel seem to be doing this.