OK, it's been a couple weeks, real life kept getting in the way. I did get an LED headlight, Installed it. Here's a link to what I purchased:
http://www.ebay.com/itm/291796762760Packaging wasn't much, it was in an unmarked envelope with a foam holder that was notched to hold the bulb. This unit is huge compared to the original bulb.
The Osram bulb I pulled was rated at 720 lumens, this one is rated at 2000 lumens. I suspect that is overly optimistic, and probably more like 1500 lumens. The light is really blue, not the yellowish tint of the old bulb. It also also very bright compared to the old bulb.
The two LEDs are on top side of the unit when installed. The light pattern has a dark spot directly in from of the bike because of this. If I ever need a replacement LED I'll probably look for a light that is less blue, and has lights on more than one side.
The fan threw me off a bit, as when I turned the bike on it started to hum, I guess I wasn't expecting any noise.
The illumination is so much better that I couldn't believe the difference at first. It makes the other lights on the bike seem dark. I guess the next thing is to replace the running lights all around.
Thanks to this forum I realized that I could use an H4 bulb base as well.
I figured out a general rule of thumb is that you get 5x more light per watt as an incandescent bulb. That means If I replace a 5W bulb with a 1W LED I'll have about the same light. If I replace it with a 2W LED I'll get more than twice as much light.
Thanks for the feedback!