Yes, these posts are always hard to answer
Currently my SF A2 is as close to a do it all as I can hope for, in terms of a single light. My modified A2 with 35K KevinL white LED's can safely take primaries as well as rechagables (non protected, unfortunately), and the LED is fairly good indoors and the incandecent is outstanding outdoors.
The only other possibility would be a single host with multiple battery and head options:
1) (HIGH power option) SF M6 with the LOLA and 5W LED TurboLamp adapter
or
2) (More practical option) My bored-out L5 (1x18650, 1x17670, 2xRechargable CR123, and 2xCR123) with a BugOutGear 3W and 5W LED modules and (the all important) McGizmo two-level classic switch.
or
3) (Cheapest) Same as #2 on a yellow G2, which of course can't use the mighty 18650 cell but still can use the two-level McGizmo classic switch.
Will