I've been looking at the Orion as well. Absolutely gorgeous piece that sits really well on my 6.75 inch wrist (the 35mm version). I'm leaning towards the Stowa due to the central seconds hand which I love and the arabic numerals. The slight added water resistance is a bonus for me too, day-to-day.
I did have a stowa flieger which I sold as I felt the hands were too small for the dial, and really not that easy to tell apart in low light. I also felt that the 2804 was too small for the 40mm case. The marine 36 seems to tick all these boxes.