Thanks for the info. The SON hubs are very expensive to be a bicycle generator (and you may need special forks to fit these). I will probably settle for Shimano hub dynamos. Wheel bearings rarely need much maintenance, so the Shimano hub should be ok for years, if not decades. I dont ride in show or rain, so it should be good as new.

The pre-built rims sound like an excellent idea. I will look for it on ebay. The LED light beams seems so much worth it's price, I dont think i will regret shelling out $$ for these units. I am not sure which one though, but this page really gives an idea of what would be the best: http://www.peterwhitecycles.com/headlights.asp

Peter White did an excellent job with his site. Hat's off to him.