Cool...you've got some nice ones there.
I also like your leather "watch coasters".
Yer killin' me! Really enjoyed revisiting those old posts.
I normally would not go against the 15400, but man, that 37mm just looks better on you.
I used to really like some of the IWC products in the 1990s, the Novecento Perpetual Calendar, the 3713, and a few others. Sadly they haven't made anything of interest to me in years. If I ever do get an IWC, it will be something from their past.
Beautiful!!! Their workmanship looks very impressive.
Great watches! The 15450 looks like a much better fit for you, especially in the side photos you posted. After 2 years of RO ownership, its definitely the watch that gets most of my wrist time. You will not be disappointed. Wishing you luck with whatever you decide.