I have a Diverite CX3 and Orcatorch DC710 (and 510 GL).
The CX3 is slightly thicker, and has a slightly brighter and more focused beam than the DC710. The 710 lasts for around 80-90 minutes, which is the minimum you want a torch to last, and its still a bit disconcerting to have a red low-charge warning light in any dive over an hour (i.e. most dives). The CX apparently lasts for 3 hours - my longest dives with it are 2 hours.
For me the CX3 wins as dive rite torches are very robust (I abused a BX for over a decade), and most importantly it has external, waterproof charging. I find what kills torches in the long run is having to take the battery out to charge/expose a charging port: one day the O rings will fail to seal when reassembled: I have a drawer full of dead torches as testament to this.
The DC710 is a fine torch. My first DC710 died after a few dives (the button leaked) but Orcatorch replaced it as they have a one year warranty.
The ZD710 MK2 landphil mentions or 720 might be a better fit for you as they are quite flexible with variable beam and brightness. The larger light-head of these makes it a bit too bulky for me.
Cheers
Rohan.
Sorry - no banana for scale.
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