I bought the SC600w IV Plus and the Emisar D4. I'm so impressed with the ZL that I intend to buy a headlamp too. The Emisar, not so much. The operation of the D4 with the ramping is a dream, but everything else isn't. The anodizing isn't as nice as the ZL, it doesn't come with a clip and people are complaining about the extra clip. Also the button protrudes on the D4. Gritty threads out of the box. Edit: Low output isn't low enough.
I've been carrying the Zebralight for a couple days. It's worked out well so far, though I wish it were smaller, particularly the head. It just exudes quality.
