I just took the Avid Envigor out for a short ride.
Turn in is very smooth.
I run a rear tire on the front, a Michelin pilot road 4, 150/70 17
which eliminates the dark side countersteer effort.
To the point about wear ratings:
Tire feels fine but who knows. Perhaps cold weather will make it slip and slide.
By the way, it is W rated, good for 146 mph. according to the Tire Rack page