I made a couple purchases.

Picked up a Surefire-style U2 knockoff that uses an 18650 battery and a K2 LED:



A modded flashlight that's had its cheaper LED replaced with a Cree unit (very high output), 3xAAA batteries but I should be able to run it with a 18650 as well:



A cheap 1-watt light that'll use a AA battery: