are the fire lens the best or not and is it mirrored too.

It depends on the conditions you ride and personal preference whether they are the best or not. You can look on Oakleys website to see what it looks like through each lens and what conditions they are best for. They are iridium coated which makes them have better contrast and reduces glare. I am not sure if they are considered mirrored but you cannot see through the lens when looking at a person wearing them.