I have added a couple of pictures to the Landscapes Gallery of sunsets across Lake Geneva when I was there in September. The sunsets there are among the best that I have seen. I do get to see good sunsets from my home in Hastings, overlooking the English Channel. What they lack is the reflections.
When I stayed in Lausanne the sunset was sadly not so glorious but I did dig the light changes on the lake, despite (or thanks to?) it being cloudy. Must be really stunning, more so than Zurich, although a Zurich native like myself hates to admit such a thing...
There is a time difference of about half an hour between the first and second picture: View of lake at 11:22 Almost same angle at 11:56 same day