Any 18mm bored Surefire C/P/Z host with a McClicky, and add the P60/D26 drop-in of your choice to get the beam profile and modes you want. My favorite setup is a single mode drop-in and a slightly modified ElZetta Hi/Low tailcap so I have full control of the modes. If you want more throw get a C to M adapter collar, an Surefire M3 head, an M3 bezel tool, and a D36 module.
The economy route (that's probably every bit as good) is to get a Solarforce L2P - you want the P sub model because it has true type III hard anodizing, and a 3 amp switch - and the P60/D26 module of your choice. Upgrade the tail cap with a McClicky switch if the drop-in you want to use pulls more than 3 amps. If you want more throw get a Solarforce M3 head, and unscrew the pill by hand. Then unscrew the pill from the reflector of the P60/D26 module of your choice, and screw that pill into the Solarforce M3 head.
The P60/D26 host route lets you lego and get exactly what you want from the light if you're willing to track down parts and screw them together.
