IMHO, the Scorpion is as bright as the Surefire 6, is about $15 cheaper and bulbs cost about 1/3 as much to replace because you only replace the bulb itself. I mounted one on my Mossberg and fired about 25 slugs and 50 rounds of #8 shot with no problems from shock or recoil. No lanyard mount, but you can add one with the right adhesive (Marine Goop). Thin nylon case either comes with or is optional, I forget which, but mine came with one. Not trendy, though.
Regards.