I'm thinking about buying a new headlight for my helmet now that my Planet Bike Blaze 2-watt is wearing out.

I run a Serfas 500-lumen light on my handlebars, which I find is pretty good base light for my commuting conditions. I use the helmet light to supplement that light and also to warn drivers who may pull out in front of me or left hook me.

The Blaze has worked ok for me, but I would like the new light to have a wider-angle beam without being too floody (the Blaze has a super-narrow beam, so almost anything would be an improvement) and substantially more output than the Blaze's reported 140-ish lumens. It would be nice to have 350 - 400 actual lumens in case my primary light runs out of batteries, but I would like the new light to have an intermediate setting of 200-250 lumens, because I think that's where I would want to run it most of the time. I also don't like the Blaze's flashing mode, as it really bugs me. A basic on-off flash is fine.

I would like the light to have an internal battery and not be particularly heavy. The Blaze is 135 g, including helmet mount. A little heavier than that would be fine.

The Light and Motion Urban series lights look nice, especially due to the side-mounted LEDs. Lezyne is attractive because their lights will take a standard Li replacement cell in case the original goes south. I'm also considering Serfas, since I like my current handlebar light and many of their lights do have replaceable batteries (though they are proprietary).

Any thoughts on these? I would really like to hear about your experience with the helmet mounts on your lights. Which ones have been the most secure and durable, etc?