I find those two tempting because they are new to me, along with RGM. Also, ever since I took a Vacheron on an expedition, I like the idea of subjecting a so-called luxury brand to the trials of the real world, and Bulgari comes to mind. If I consider instrument watches, I would include Breitling and Omega diver's watches. A titanium watch and rubber strap would gain extra points for me as well.
Your vintage piece is very pretty but unfortunately I would be concerned about its age and lack of luminescence...also the altimeter would be useless at those altitudes.
Most current short list:
Ball Engineer, Alpina Extreme, RGM GMT, Bulgari Scuba, Breitling Superocean/Seawolf, Omega Seamaster/Planet Ocean/X33