I notice that you're not the OP. (Edit: I didn't mean that to sound cranky, it was unclear from your post just mentioning that you aren't the OP saying you went with this light for the OP's specific needs.)

Of all the brands, I think #1 for failing is obviously the cheap chinese knockoffs, but in more name brand types I think Niterider it probably the one I read about on the forums failing. If I wasn't getting a dynamo, and wanted reliable, I'd go with Light and Motion, or my Dinotte lights seemed pretty well made as well.