So might I be happier with one of the higher end lights that are 4x as much? I don't want to spend $100 on a light only to find out I should have spend $200 or $300, and have a $100 light that I don't like. I wish I lived somewhere that people actually sold this kind of thing.
Well, you know what - you really do have to actually "use" the light to know how it works.
It is my understanding that the "newer" XM-L MS 900 light is yet brighter than the original. If this is indeed true, then it is unlikely you could need much more light.
The truth is, the expensive lights provide more reliability, and involve higher quality workmanship and materials. But you must pay a pretty large premium to get much more light than the MS900.