Krav is good stuff - you can achieve proficiency in a comparatively short time. But, don't wander around the middle east in a Krav Maga t-shirt! A Rosetta Stone Arabic course might be a good investment, you don't have to be fluent but some phrases certainly help.
IMHO, the best overall training in protecting yourself would be a good Executive Protection school. I went to ESI ( http://esi-lifeforce.com/
) but EPI ( http://www.personalprotection.com/
) is excellent as well, and is a shorter course.
The difference between a "self defense" course and an Executive Protection course is that EP trains you to avoid trouble in the first place
via planning and removing/reducing the bad guy's opportunity to hurt you. A self defense course will give you confidence, but a good EP course will completely and permanently change the way you think.