I just got a Mega Ray UVB bulb from Reptile UV. While searching around I heard good things about this product, even though it's new. I talked for a while with the owner, and he seemed very knowledgable and caring. I decided to try it out. I got the unit with external ballast, and a sixty watt bulb. Mega Ray claims that their product lasts longer than the others because of its external ballast. Also, when light goes out, you just replace it, and still use the same ballast. they have a longer guarantee also.
I'll keep everyone updated.