I run the Blackburn Mars (two) for rear for both daytime and night time riding. My daytime running light is a Blackburn 3.3. For night riding, I use four Cateye EL650s.
However, I'm running into the issue of replacing the Cateyes. It appears that nobody is making AA battery lights anymore. They expect dilithium crystals and some sort of warp core to recharge them.