What's a Good Choice for an 18650 Zoomie??

probably not as good as the others mentioned, but no sharp edges, bezel is not too large, and zoom is smooth. Smaller than many. I doubt 3xaaa will fit, but I can try it later.

http://www.dx.com/p/ultrafire-at-916-cree-xp-e-q5-120lm-3-mode-white-zooming-flashlight-black-1-x-18650-287954#.U4JHVRVX-uY

On a standard sipik style zoomie, how much would dedomed vs. domed LED make a difference?

I think the SK98 is a better option than the 68 if you are up for some modding.
Check this one out I found on eBay for $5:

Scroll down the page for some pics…

Okay: now I see this thread is old… overall, I think the XP-L HI helps in this application. I don’t have a good reference though…