A bright spot you get with a small light source and a big and good reflector. This means you need to go with the LuxIII for now and forget the LuxV ... AND ... you will have to think about how big you want your light
The modded Maglite is one hell of a thrower but a bit on the big side if you want to pocket carry it.
A very small light and good thrower are all those 27mm reflector lights using the PR or McR-27 reflector like the Aleph1, McLux-PR, Gladius (IMS27 reflector), LH, ...
In the medium size category you have a lot of lights, and some of the best beams and biggest throw are offered by McGizmo's Aleph3 or HD45 or 27LT lights.
It would be best to define your needs (especially size) first, and chose then. There are plenty of options.
bernie
Aleph1 heads on 1x123 and 2x123 bodies:
Aleph3 head on SF E2e with Aleph tailcap:
HD45:
27LT:
McLux-PR head on E1e: