Very serious collection. I have a humble collection inspired by the legendary Nick Faulkes. He said in his article about the 5107 that a perfect collection would be 5107, 5035, 5110 and 5134. I added pieces - replacing the 5107 with a 5127 due to what cam...
You seem to like calatravas, so maybe keep one of those with the 5110 and get the best complicated piece you can with the proceeds of the other three. For example, a 3940j/r. 5110 and 3940 is a dream combo in my book.
Let's say what you have is worth 96K USD (5196j, 5127g, 5296g, WT, AC=> $15,$18,$18,$25,$20 So if you're really settled on 3940 being too small - and trying to stick to patek 1. Less coherent but more fun: a. 5205g - (allows you to keep you other watches ...
Trust your gut and keep what you like. The fact is that no one really cares what each of us collects -- watch collections are ultimately personal expressions of things we enjoy and appreciate. Like you, I love the 5127 and 5296. Are they redundant? Sure, ...