I currently own a medium brown dub monk and I'm having a dark brown oxford being delivered in a couple of weeks. I've read various threads on the subject of matching belts and shoes and I'm in the camp that says if the color is close enough, the belt/shoe combo is fine. Now, I'm having a hard time deciding between purchasing a medium brown belt or a dark brown belt. If at all possible I would like for this single belt to pull double duty for both of these shoes (and other future medium brown and dark brown shoes). I would be wearing this with wool trousers in a business casual environment or occasionally with suits. In the event that I get a tan colored shoe in the future, I figure I will have to get a new tan colored belt. So which one? Medium brown or dark brown? Or is it really necessary that I get both? I'd rather get one if I can.