Broy makes it twice on the list http://www.nba.com/video/channels/nba_tv/2009/02/24/nba_20090223_game_winners.nba/
I like the overall circumstances of Roy's shot vs. Houston better, but I can't hate too much on Harris for that.
Harris' shot was incredible, but it is hard to consider it anything but a fluke compared to the other shots on the list.