I need some help deciding on new headlights. I was going to go with the L&M solo but now having second thoughts.

Old setup: performance dual, 15w and 20w halogen NiMH. Problem: shorted out in cabling. Performance gave full credit. YEAH! Light output was barely adequate and in cold the run time dropped to dangerous levels. Rated 120 minutes but dropped to only about 60.


Needs:
1. handlebar mount
2. cost under $400, and preferably between $250 and $330.
3. more than 300 lumens
{I have 3 dangerous situations:
A. downhill for about 1/2 mile, in daylight clipping along about 25-30 mph. Night would like to go 20.
B. short steep downing into a tunnel that water drips down on. In winter it freezes. I would like to go 8 to 12 mph over this stretch.
C. 2 lane road with 40mph traffic. Sides often have rocks, sticks, and loose gravel or sand.
}

Where I am so far:

L&M Arc is nice, but $400 is too much right now
DiNotte 200L dual is nice, but still $350 and not sure if bright enough
NiteRider MiNest Dual X2 is good price, $230, but only fair reviews
BR 21H, $350, unknown lumens. FAQ lists 360, stats lists 410.

So, suggestions, comments, experience with any of these?