Looks good. I agree on the adding of the third light in the middle, the way it is now leaved a dead space. Looks like you've enough space in the strip to turn the sockets around, where both bulbs point at each other and that would take care of the dead spot, and still be able to get light to all corners of the tank. But I don't think that adding the extra light is going to hurt, so personly I would do that.
Deffinatly do something for a better reflector. Your paying for the electricity, so might as well squeeze every bit of light into the tank that you can.