Not sure if I asked this here, but I need to get a second dyno hub for my wife's bike. Can anybody compare the Shimano, Shutter Precision PV-8, Sanyo and SON hubs? I know from the recent Jan Heine articles that the light outputs (i.e. electrical power outputs) are very similar for the Shimano, SONs, and the Shutter Precision, but what about quietness and vibration? I get a small buzz from my 6-year old SON, but are the much cheaper Shimano and SP as smooth? Is the difference worth another $100? SP PV-8 is typically about $135 on Ebay, while the Shimano is a little less and SON is nearly twice as much (more for some models!). I got my SON in a wheel set which was underpriced; I've been reluctant to buy one new due to my inner cheapskate acting up.