What is your definition of pocketable, and how practical do you need it to be? (ie runtimes etc.)
The Manker E14/Astrolux S41 come into mind first when it comes to WOW lights. It's really small, and spits out 1500 lumens of neutral white hi cri goodness if you choose the Nichia edition. The only thing is that only lasts 40 seconds before it steps down to 800 lumens, then it steadily declines from there and lasts for only about 8 minutes. The copper looks nice too, and makes it heavy, so it makes it real nice to feel in the hand.
If you were going after wow'ing friends, that would be my first recommendation.
Vinh's SDMiniVN is another WOW light you can have, but it wow because of its throw, and not necessarily its output (although you can get led options that get up to 1600 or so lumens.) I rather wow friends with its throw though.
On the complete opposite of the spectrum, from a pure practicality standpoint, are the Zebralights. SC600 MKIII HI will get you a nice warmish white, while being very small for an 18650 light, and will spit out 1300 or so lumens on startup. It's very practical because the UI allows easy access to low,mid,or high from off, and the highest modes have PID, so it will regulate the output to keep the light cool and running long. The other lights are direct-driven for max lumens from the start, but the Zebralight has output regulation, so even if the battery is only at like 25% of its capacity, if you turn the light on at its highest output, it will be that same 1200-1300ish lumens that you initially had when the battery was full.