I'm partial to the Cavision compact finder. Since I do a lot of location scouting, and since I usually travel by motorcycle, bringing even something so small as a DVX isn't very comfortable for me.
When I scout with the finder, I can pretty rapidly get a general sense of what the camera department can get from any given setup point, and - if the director has deigned to communicate clearly what he/she has in mind - how hard to push a specific location.
Plus, it makes you look good, when the production designer, or director, or producer is trying to get a lock on how a particular location or set will shoot, and you can just hand them the appropriate tool and say: look through this.
When I scout with the finder, I can pretty rapidly get a general sense of what the camera department can get from any given setup point, and - if the director has deigned to communicate clearly what he/she has in mind - how hard to push a specific location.
Plus, it makes you look good, when the production designer, or director, or producer is trying to get a lock on how a particular location or set will shoot, and you can just hand them the appropriate tool and say: look through this.