Hello,
I have been lurking here for quite a while.
There certainly is alot of excellent information and input here.
I thought I would contribute some information as well.
I was fortunate enough to be one of the first few to buy one of the new Stenlight headlamps, and I was the first to test the new Prototype Reflectors that are being made for the Stenlight, by close freind of mine, Jon Sidney Burlison, which is a Stenlight dealer also.
You can visit his website at http://www.jsburlysflashlights.com
You can read more about the Stenlight on its creators site.
http://www.stenlight.com
Jon not only has the best prices anywhere for the Stenlight,
he liked it so much, he has been doing his best to make sure all the hard core cavers knows about it.
He also wants to do his part to improve it, so he started work on the Reflectors to replace the stock optics in the Stenlight.
The Reflectors are also reviewed on my site, and I must say, they are quite an improvement.
Anyway, here is my review of the Stenlight, and the Prototype Reflectors.
http://www.jtice.com/review/lights/stenlight_s7/
Please feel free to contact me with any questions you might have.
~John