The emitter is going to be a very warm temp, I'm assuming you realize that? This will result in reduced brightness but with a more yellow color closer to what a standard incandescent flashlight would have. This page has a chart to give you an idea of the color range of the various temps:
http://www.venturelighting.com/techcenter/lamps/color_of_light.htm
The emitter you selected is listed as 2800-3000k making it on the warm side of the scale. Some people like these as it looks more natural, and give better color rendering while a cooler emitter is brighter but makes colors look faded and washed out. I have a flashlight with a very warm XR-E emitter that I use when grilling; this allows me to see the condition of the food I'm cooking better than a cool emitter.
The host you listed will have a very small emitter reflector; I would assume only 18-20mm; only 23mm for the host overall diamter, take away a couple of mm for the bezel and that doesn't leave much. Again, this will be very floody, not a thrower at all.
I don't know about the cells you selected; I typically purchase these:
http://www.fasttech.com/products/0/10000377/1050702-trustfire-18650-37v-2400mah-protected-rechargeable
...as they are decent cells and are generely reviewed positively. Typically, it is not recommended to go cheap on your cells.
Chargers: I use this one, and have never had any issues. Protected cells are a tight fit, but they work. It's will chage two cells, and is a universal charger so you can charge 10440s, 14500s, 16340s, 18350s, and 18650s.
http://www.fasttech.com/products/0/10001527/1114000-trustfire-tr-006-30v37v-li-ion-battery-charger
http://www.fasttech.com/products/0/10000856/1073301-trustfire-tr-001-multi-purpose-lithium-battery-cha
If you ever antcipate moving up to 26650-based lights, I use this charger: <Added! Read GaryB's warning below!>
http://www.fasttech.com/products/0/10001527/1114000-trustfire-tr-006-30v37v-li-ion-battery-charger
It's bigger, fits the protected cells better, and supports up to 26650-sized cells.
To make you own gold/copper/bronze colored lights; just disassemble the a black-anodized host entirely, making sure there are no o-rings or other non-aluminum parts on the light, and put in a toaster oven on the hottest broil setting for a while. It will start out by turning a dark brownish color and moving through a deeper bronze tint through until it becomes a goldish color. You can stop the process at any time if you find a color you like. The final color will depend on the temperature and the anodizing on the light, so different pieces may not match perfectly when you are done.