I am a big Surefire fan, but have recently been trying Streamlight.
My first was a Surefire E2L Outdoorsman with high and low settings. A bit expensive at almost $200 but its been a solid flashlight for the passed 10+ years. Its not the brightest but extremely useful and durable. Perfect for camping.
Then i got the G2X with high and low. Its a really good bright cheap Surefire that i use in my car.
I recently got a Streamlight 88061 ProTac that is pretty sweet as a EDC since it can use 1 AAA or 1 CR123 plus it has high output, low and strobe. Its super bright.
I also recently got Streamlight Siege X USB Lantern/flashlight. Its a great little lantern that can use CR123 but is also rechargeable. Multiple brightness settings and also a Red mod wich it great.