for touring of any duration, IMO you want a light that operates on simple household batteries or step to a dynamo system.
you don't have to spend a couple of hundred dollars, a 1 watt or 2 watt planet bike superflash, a niterider ultramax or any of the other 1-2 watt LED disposable battery bikelights. bright to see by, visible as a safety flasher, useable as a flashlight.
a rechargeable light system is overkill for touring, and will chain you to recharging frequently which is a huge hassle unless you want to spend a lot of down time waiting for red lights to turn green
.