If you're worried about throws and locks/counter-locks, I say go for the FMA family, specifically dumog.
While BJJ is the toast of the town, it is not effective for the street fight situation, unless you're using it to gain the quick advantage and get back up in a hurry. Ground fighting on broken glass, concrete, smashed brick, curbs, etc. Is not a good policy.
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"Empty your mind. Be formless, shapeless, like water. You put water into a cup, it becomes the cup. You put water into a bottle, it becomes the bottle, you put water into a teapot it becomes a teapot. Now, water can flow like a river, or it can crash like a waterfall. Be water, my friend." -- Bruce Lee |