Took some Krav Maga classes last year and thought they really helped. Were too expensive, but I continue to train on some of the fundamentals. The place I went had a heavy emphasis on fitness, but talking to the owner it was more of a filler. Some people complained they weren't getting enough out of the class when he first started it because they were focusing on technique. He taught technique well, but was just giving people the extra fitness.
I really liked his philosophy: Best case is to avoid a fight at all costs, next best is to end the fight as soon as possible. He showed punches, kicks, knee and elbow strikes, defense, etc. but all with the emphasis of going for the throat, eyes, knee, etc. While there was some sparring, he acknowledged that it is impossible to truly spar with the degree of self defense that he was emphasizing. I got a lot out of the class and feel that all of the practice with other people will increase my odds of acting correctly in the situation should it ever arise.
You can't go wrong getting some kind of martial arts or fighting training. Some will be better for you than others in that they will maximize your strengths or hid your weaknesses, or they may coincide with your personal philosophy.