Not speaking from personal experience but I've seen alot of people EDCing the Maratac flashlights that country comm sells. They look pretty durable and I'll pick one up one of these days.
In terms of a keychain light I used to use chinese fauxton flashlights and just replace them after they eventually broke. Lately I've switched to the innova microlight and I'm pretty impressed, the light is very bright for its size and the construction seems more durable...the LED is very protected unlike the photon/fauxton sytle.