I've just had the final version of Dux Bellorum's cover sent to me by Osprey Publishing. This looks superb to me, and very much an Osprey-style cover. It oozes atmosphere.
As a game designer, it's great to see the final cover art that's going to appear on your game, especially when you've not had to draw it yourself (!); I've always been excited about how my games will look in print, from the more humble Glutter of Ravens: Warfare in the Age of Arthur right up to Andrea Sfiligoi's wonderfully colourful Song of Arthur and Merlin cover.
All. Very. Exciting.