fill out the checklist? the klarus is a mid range light, the sc600 is a flood, and there are throwers too. depends what you want. the sc600 isn't really a "wow factor" light to me, cos the beam dosen't reach a very long distance, but it lights up everything close.
Not sure about best, but one of the brightest might be the Trustfire X100. From the reviews I've seen, the Trustfire X100 pulls around 4 A from 3 batteries, and should result in 1.5A at the LED assuming 25% driver losses. This should give 2000+ lumen out the front. A lot of assumptions were made here though, so it might be brighter or dimmer then 2000 lumen.. Calculations done with the T5 XM-L bin (511 lumen at 1.5 A) and assuming 33% loss from emitter to OTF. It is a big light though and uses 3-4 26650 batteries.
The checklist would be nice so we know what size and type of light you want.