I would go with the Quark and in the single AA tactical version. The .2 lumen setting is perfect for late night head calls at home without blasting yourself awake and also for the in tent gatorade bottle call without waking yourself more than necessary or silhouetting yourself for an impromptu puppet show and a slight bezel twist can bring you to full output. Additionally, should your preferences vary the two available modes can be programmed to your liking. Should you need more maximum output the 123 version, especially with a RCR123 has plenty of throw and lumens for most any camping task in a shorter body. As to reliability, I have yet to experience a problems with mine but with vital gear I practice one is none no matter the reputation.