Take a look at the new Serfas E-Lumes. They look sturdily made, the more powerful 1100 and 1500 models have dual LEDs. A local cyclist who's tried other lights has an E-Lume now and likes it. The dual LED E-Lumes also appear to have well shaped beams with good peripheral distribution.

But I can't tell from the demo whether it has a built in hood like my Serfas SL-255, which does a good job at preventing spill so it minimizes the risk of blinding other users on the road -- although the older Serfas had beams that were a bit too tight like spotlights without much peripheral beam. However I often use the older Serfas on the MUP to avoid blinding other cyclists and joggers at night.

Much as I like my L&M Urban 500 I'd consider an E-Lume for my next headlight, especially if I wanted to run a more powerful light at medium output for longer battery life. I usually run my L&M Urban 500 on medium unless I'm in a rural area where deer and other critters may dart across the road. So the E-Lume 1100 at 400 lumens on medium would suit most of my needs.

BTW, I've compared various Light & Motion lights at REI, which has a good customer accessible display board. The Taz was underwhelming. Even the Urban 500 was brighter than the Taz 800. The main difference was the Taz had a somewhat more evenly distributed light, but the Urban series already have more evenly distributed beams than most single LED headlights I've compared at REI (which includes many of the most popular brands and models). The main advantage to the Taz might be as an urban headlight, especially if the US ever adopts German type laws regarding confining beams to prevent blinding oncoming motorists or cyclists (unlikely to happen in the US).