This thread was definitely tl,dr for me tonight, so what I got out of the first page or two is that
This light:
http://www.dealextreme.com/p/ultrafi...-1-18650-39359

with this battery:
http://www.dealextreme.com/p/trustfi...pack-blue-5790

and this charger:
http://www.dealextreme.com/p/digital...y-charger-6105

would be a good combo. I feel like I'm missing the mount itself... Or does that flashlight come with a mount? And do the mounts work on the stems or 31.8 handlebars?