Currently carry an L4/McE2s. This light is new to me, and before I got the McE2s I burned thru a pair of batteries in just a few days. Hopefully the new tail switch will really help the runtime. But a 2x123 is not optimal for EDC, at least not for me.
If protected r123 batteries ever get ironed out, I'll switch over to the KL4 head on an e1e. Not sure if the current crop of unprotected r123 batteries will run a KL4/e1e in regulation.
Next favorite is the QIII. Small and bright, which is just what you need in an EDC.
I still carry a Stinger or Ultra Stinger when going to a Stop and Rob at night.
best regards