Well done on your PhD!
Just to throw an idea in the mix: I would try to make up my mind between GMT and alarm complication. Combining the two may be a stretch.
The Leman is nice but personally I find the dial a complete mess. I have not heard the alarm sound
What about an JLC International Master Memovox black dial from a few years back? This seems to fit your bill if you want a black dial. I find the alarm much more useful than the GMT
I have the simple manual Master Memovox and the alarm sound is superior to anything else I have tried (not applicable to the Leman as I have not tried it - check online videos to have an idea maybe?)
nb - I am with you on Rolex: too visible for others as far as I am concerned. I like the brand but it is shouting a little too much. Only exception is a vintage simple Datejust or Explo on leather.
It is just a question of culture and environment. I feel most Europeans in general tend to be more discrete. In other parts of the world, the general attitude tends to be 'if you like it, just buy it and do not bother with other people's attitude, misconceptions or feelings'. As a consultant, I avoid shouty watches to avoid clients feeling they have just paid for it.