My choice will be detemined by rechargable batteries.
I've heard lots of good things about the Eneloop but little to nothing about rechargable CR123s. What say you.
AFAIK the EZ CR123 cannot take a battery with voltage higher than 3.0V so if you do decide to use a recharegable cells make sure they are the correct voltage.
The more popular rechargeable Li-Ion cells used around here are 3.7V (but come off the charger around 4.2V)
I say get the EZ AA for availability of AA batteries.
I just posted there, but asked about rechargable CR123 batteries with no mention of a flashlight.
I hope they'll be patient while figure this out so I don't get booted. :mecry: