I use the Fog City Hyper Optics. This unit works well. I don't need to wear sun glasses. Visor doesn't fog at all.
A friend used another brand and he doesn't like it. Doesn't change much in the sun and gives off bad halos and distortions at night. Sorry I don't know the brand. He got it from Dennis Kirk and I know it was a little less money than the Hyper Optics.