Where would I find the best Aquanaut or

[jim543]

Nautilus? I have heard people talking about MBK who are they?

[neverworn]

that

[mbjoer]

From what I read here, you might be better off dealing with Naarika who is able to source from there as well. He is based in Europe and a very easy guy to deal with, which expecially matters if there are any problems.

Eurotimez sells their watches as well, but is no longer recommended here.

Use the search function, and you will probably find that there is very little gained by buying yourself in Bangkok.