I have two Orcatorch D700s as backup lights. They've been excellent and reliable over ~300 dives in 2 years. I've burn-tested them at over 3 hours with 21700 battery cells, and I haven't ever had problems with them flooding or turning on inadvertently due to pressure (something that can happen for twist-on lights that are left too close to 'on' on the surface).
However, for a primary light in this price point, I'd also strongly suggest the XTAR D26 1600S, which can be had for ~$80 most of the time. It also runs on a 21700 battery, but has a brighter/tighter beam, as well as a threaded hole for attaching to a Goodman handle (which makes life a lot easier with a primary light). The D26 + Orcatorch D700(s) as backups make for an excellent set for tech/night diving, as they both take the same batteries, so you can cycle through your rechargeable batteries and make sure that none of them are sitting not being used for too long. (I take the battery from my backup and put it into my primary after every dive, then charge the discharged battery from my primary, and put it back into a backup. With two backups and one primary, it means each cell is getting discharged once every 3 dives. No concerns about rechargables sitting unused for months/years before needing them.)