I love seeing the gears and discs below the surface, but the glowing moon phase and stars is what really does it for me. The Lumen treatment seems to be be the prefect compliment to Lange's wonderful moon phase discs.
I recently acquired a 3579 with a 33 mm case and feel that it is a great size for these types of unique vintage Patek watches. The 2594's beautiful platinum bracelet will only give it even more wrist presence.