I also wear Tifosi's. I have a pair of Envy and a pair of the Quam 1.5 and I love them both. The Envy's are my favorite for summer riding because they have a bit more sun coverage. They come with interchangeable lens or with polarized ones. Lots of options and many, many frame styles.

The owner of my LBS told me that the guy who started Tifosi was actually from Rudy Project who went out on his own because he felt that there was a market for high quality affordable lenses. I have no idea how true that is....

This is the Envy (mine are a bright blue from a couple of seasons ago):


And this is the Quam 1.5: