Jandd makes some great handlebar bags that enhance any casual or serious riding. The front mounted position makes it real handy for accessing food, camera or anything you would want without having to dismount and get to another storage place. Additionally, having a map window on the top is way nice while traversing new trails or routes. I particularly like the larger model which has the capacity to place my entire camera bag inside it, thus giving easy removal of the whole bag at any time , while still giving the option to take the whole kit and kaboodle with me if I want to take everything in the bag, like if you're entering a restaurant.
I've attached a short video that shows how easily the bag removes and reattaches.