My favourite of the four by a long way would be the Grand Lange 1 Moon Phase 25 years as everything just looks perfectly balanced and in harmony plus the white gold and blue just compliment each other so well. On the Grande Lange One Luna Mundi I fall into the camp of people that find the dial unbalanced and it would disturb me to look at it all the time, but each to his own. The Grand Lange 1 Moonphase Lumen whilst sharing most of the same design as my favourite has a much too busy dial motif for me that again I find disturbing hence my choice of a favourite.