I like ReeLights (the big set of front and backs) as "be seen" lights. You'll never worry about batteries again, and they're cheaper than a dynamo hub. Being bolted on and hard-wired, they're not an attraction for theft either.
Like RubeRad, I like a regular Cree flashlight for lighting up the road ahead. I mount mine using a super short handlebar stem (aluminum) with an aluminum flashlight body. It stays bolted on all the time, and is always at the right angle. Never had an issue with theft.