I've had several pair of Tifosi sunglasses over the years. My go-to pair at the moment are from their Light Night line (I got them at TE). They change from clear to a smoke tint depending on conditions. I also have a pair of their Fototec lenses, but I found they didn't get light enough in low-light conditions, so I switched primarily to the Light Nights. If I'm really going to be in full sun the entire ride, then I might opt for the Fototecs, but I otherwise prefer the Light Night so that I can see in shade. I just don't really like to fiddle with changing lens out based on the conditions. They're pretty light and comfortable. I'll admit, however, that I haven't really tried other brands.