Rolex

Another Rolex, if you want something smart , GMT master 2 would be great choice, or Sub LV although I haven't seen in flesh.

But, IMO, DSSD would be iconic watch as still worlds first deepest diving watch, despite it's size,

Other reccomendation can't be wrong, pp nautilus, ap ro, or fifty fathom with" No radiation sign", is nice.

If you willing spare some more, IMO

Hope this help

Best

Eddy