My best EDC light is an SSC modded HDS Basic 42... but it is a bit bulky in diameter. Most of the 1xAA lights are a nice size, but I think the C-LE is about perfect. It's the shortest 1xAA light I own and I really don't mind the twisty. The main one that I carry has a piece of foam in the tube and on the head so it's pretty hard to activate it, which I like. It's fine two handed and slightly hard one handed, but it will never turn on on accident.
Out of the three that I have, I have one that doesn't work reliably and have been thinking of modding it with a Flupic and a proper heatsink. Just think, should be over 100 lumens on momentary/high, and I'd set the medium to about 20 lumens and the low to maybe 4 lumens or so. Only drawback would be it doesn't run on anything other than a 14500.
It would be nice to have a Jetbeam C-LE-type light that runs on an 18650. Relatively thin aluminum and a twisty for almost the smallest possible 18650 class light.