Stop the madness! You know, when I originally posted this question a month ago I thought I was worried that the discussion of bike lights would inevitably become a discussion of Russia's occupation of Latvia.

As an update: I bought the PB SuperFlash after reading the replies here, and I am more than satisfied with it. I could fit up to three if I really wanted to on the back, but for my needs one is almost more than enough. I guess I would get the Dinotte if it were the same cost, just for the fun of it.