Where to go?
As far as getting a 737 DEC job in Europe, Middle East, Far East, Asia...
The world is your cup cake.
I would contact an agency first to see all the options, there should be quite a few.
All depends on your personal tastes and preferences.
How is your overall health?
Do you want to learn a new language?
Do you want to be home regularly?
Do you want more structure or less structure?
Are you bringing a family?
The options on this are truly endless.
Requires a couple of trips abroad to check things out and see what kind of foreign cultural experiences you are up for.