Help me pick a Rolex watch....

[No Rolex Yet]

Hello members,
I have been a lurker for a while and also on new turfers.

I don't actually own a Rolex. Not yet anyhow!

I am familar with nice watches as I have owned a Tag formula 1 - stolen years ago, and Omega Speedie (auto) which I traded for a classic Breitling Navitimer a few years ago.

I want to have a small collection of 3 or 4 nice watches. So far I have my Breitling which is a keeper. I am hoping to add a watch every other year - otherwise the wife may not understand.

My wife has a Two Tone Datejust which she bought years before we meet - perhaps a gift from a former love interest? I have no idea nor do I want to cause a fight. I have now been bitten by the bug of rolex.

My requirements are as follows:-
a - it must be waterproof
b - it must be good for formal occasions and smart casual occasions
c - needs the date to be displayed
d - leaning towards 2 tone
e - probably looking to buy used - wingates?

Any advice would be great.