I have it narrowed down to Toyo Versados and Yoko Envigors. I feel that I may benefit from the Toyo touring tires on my G35xS this Winter but I don't want to give up much performance next year. I friend praising the the Envigors on his TL.

Thoughts?

Can't speak for the Toyo as we do not carry them. However, I have had great luck with the Envigor. In a rwd I'd say moderate snow at most, but with an X you should be able to tackle harsher weather. Call me when ready!