Nice BWC Alex.
Your nylon suggestion already looks more adventurous than my initial thoughts. So good luck finding it.
I reckon a mid to lighter shade of brown/ tan would compliment that dial.
Have fun experimenting.
I really think you can try many with this silver/white one & still be right - which is maybe why you ask in the first place to make up your mind 😀
In addition to what has been proposed I would say :
Racing straps like the bulangandsons ones ?
If you don't like your current black one why not play with colourful leather ones (like the molequin saffiano ones) ? You have the bold choices but also the rather safe ones like green, blue or you can lean easily towards clear ones like cream, or taupe etc ?
Some texture with vintage pigskin like the ones from Torre on IG ? or Lezard like Camille Fournet ones ?
You could even try some suede ones...
Let us know what you do in the end.
Always curious to see the results.