Hey thanks for firing up this thread again! It got me to do a little looking around at Cygolite. As they're still my fav with the Cygolite Hotshot Micro 30 USB. Which is way less than $25 if you can bring yourself to shop on ebay. I myself have no problem with ebay, for buying, selling is another thread. Speaking of which, you can get the Hotshot SL 50 USB for less than $25 too. And you don't have to have an order of $35>, or whatever the minimum is (on Amazon).
I've had no problems with Cygolite, other than they don't include the clip option for their lights. They have it, but you got to write them and ask for it. That's the only thing that bugs me about them. I saw that they have the Dice TL 50 USB (for less than $25). I'm going to pick this up if they can send me a the clip option for it.
BTW the Chinese no name stuff looks interesting, but the lights that are working for me are not that bad at all. If I was dabbling with rear lights, I'd give them a try!