Dynohub is great! I got one a winter ago, and it's always ready. I went with the IQ Cyo R, and while it doesn't put out as much light as some of the floodlights on the market, you'll find it's much brighter and has a larger road track than the 1W beamer.

I like this setup so much, I've got another one ordered for the spare bike; this time I'm blowing the budget and trying the Edelux. Stay tuned...