725
Have you ever seen the optional after-market (but genuine) floodlight fixture for the 700 and 725?! I had a 725 with one on it but it's long gone now. It was a circular cap that you attached to the top of the motor in place of the existing motor cap, and in the front side of the cap was a "lip" that stuck out covering the light bulb.
Then of course the 750 came with a headlight as standard equipment.