I'm leaning toward ordering a B+M Ixon IQ or IQ Premium because:

• Prices have recently dropped, and the B+Ms are priced competitively with anything else readily available in the US;
• I occasionally need more than 1-2 hours run-time on bright. That narrows it down to lights with replaceable AA or AAA batteries.

I like the convenience and light weight of my USB rechargeable lights, but I've run out of juice a few times before getting home at night the past few months. Sure, I could extend the charge life using flashers, but some group rides object, and a flashing main headlight may help cars see me but doesn't help me see the road.

I'm also considering the Light & Motion USB rechargeables, but I need to see a few beam pattern demos first. Most bright headlights I've looked at are basically just flashlights casting non-patterned pools of light.

After using a modestly bright Vivo Bike Illuminati for a few months I've come to appreciate the shaped beam pattern - the design is similar to the B+M with a top mounted LED and mirror casting a fairly definite beam pattern that controls spill. It's nowhere near as bright as a B+M, but it's a great little lightweight helmet light.