I've seen your collection and I think a nice leather rose gold slightly dressier piece will round it off. Not saying it's a must to have a dress piece cause seriously how many of us really have to attend black tie, tux event but just for versatility of the collection.
And 50k for IWC!?

I'm seriously disappointed in the brand ***** in you.
With 50k you should be looking at PP/AP/VC/ALS or at minimum JLC to do justice to your brand whoreness.
+1 for this.
Of course there is. Value for money isn't how expensive or how cheap an item is.
Given the history and technical expertise of JLC, what you are getting for the price you pay VS other brands, it really is one of the better "value for money" and understated brands around.
All luxury brands are what they are partly cause of the marketing machine. JLC merely lost out in marketing, which is good for us as consumers, more watch for the money.