If you want a 36mm Explorer go for it! Great watch. I sold a minter for £3k a few years ago but they are fetching more than that nowadays. BB36 is a good shout but have a look at the 36mm Datejusts too. They come in all different dials and bracelet types. The closest reference to the Explorer is probably the 16200.
Have a look at the Omega line up too. The Railmaster and Aqua Terra lines are similar in style to the Explorers.
Get to a few watch shops or watch fairs (assuming they are still going) and have a good browse of the forum if you haven't already.