In reply to theterrorwheel:
The H14.2r has 350 lumens without the boost, which is pretty hefty for walking with. The Lenser seo5 chucks out about 180 lumens, which I've used on occasions for mountain biking with - also saw me through the night nav on my summer ML, if that's not enough, the seo7 has 220lumens.
I get the impression that the problem with high power head torches is the heat issue - you can get mountain bike lights with significantly higher light output, but they tend to come with heavy aluminium casings with cooling fins, and rely on decent airflow over them to keep within their operating limits. You could possibly use one of them if you were running with it, but if it's for walking, I suspect you might not be moving rapidly enough to keep it cool at high outputs.