There are several I'd like to see get made, that is if Hollywood wouldn't screw them up.
Gates of Fire- by Steven Pressfield- It was supposed to already be in production, but I think it is in development hell.
Ice Station- by Matt Reilly- The book was very good... Antarctic setting, gun battles aplenty, man eating killer whales.
Hunters of the Dark Sea- by Mel Odom- Sort of a blending of Herman Melville and Jules Verne.
Neanderthal- by John Darnton