I have used/carried all the below CR123A lights as EDC. Listed in order of purchase as I only started using CR123A lights since 2015.
Streamlight Protac 1L (180 lumens). 2015.
Stopped using as developed terrible flicker after a about 18 months, that I couldn't resolve (tried everything including other switches), so issue seems to be in the head, but never dropped.
Elzetta Alpha. 2016.
Stopped using as high only, so of limited use. Plan to sell.
Streamlight Protac 1L-1AA. 2016
Now my backup light, carried on my EDC pack. I don't really trust the Streamlight Protac series as they are cheap Chinese made lights and I have had bad flicker issues with 3 other models, but so far this one has held up good.
HDS EDC Executive 250. 2018.
Most most used/carried. Best EDC light ever IMO, I highly recommended it. Long runtimes, perfect balance of beam, and good throw on the XP-G2. I've never felt I needed more than it's 250 lumens.
Malkoff MDC SHO. 2018.
Recently sold as I just wasn't using it any more, due to high only.
HDS EDC LE 250. 2019.
Second most used/carried. Awesome runtime on high, but hard to beat the general utility of the Executive model.
Surefire Backup E1B-MV. 2019.
Nice light, but stopped carrying as it has a terrible 27 min runtime on a primary CR123. Nice low for indoors, but of limited use walking outside in the urban areas. Still deciding to sell or not.
Surefire Vampire V1. 2020.
Nice throw, but of limited applications after I carried it for a while. Also plan to sell.
Although there are so many CR123 lights on the market, many have side power buttons (Olight etc), I avoid all these types, so only ever considered the above for EDC pocket carry.
Overall I've been fairly disappointed with most of my CR123 lights, apart from my HDS ones. If HDS Systems didn't exist I'd probably go back to AA lights and carry a Fenix E12 V2.0.