I've used Road Attacks, Pilot Powers, and Diablos. The latter two on the track worked really well for grip, though I'm finding the Powers are pilling worse than the Diablos; not sure whether that's because I've gotten better or the tires don't fit my use as well.
The Road Attacks are my street tire but I'm not doing canyons or anything requiring much grippiness and am instead keenly interested in mileage.
Every tire is a balance of grippiness versus wear. If I didn't care about cost I'd go back to Diablos around the clock.
Dragging knee is for the track, and dragging tail is for the lot. --Kane Friesen
When you're in a car, you're watching a movie; when you're on a bike, you're in the movie. --Robert Pirsig
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