If you are an advanced, and very aggressive rider, Here's the scoop.
I have tested Avon AM 26's, Metzeler Lasertec's, IRC Durotours, and Bridgestone BT45's under extreme duress.
I cannot speak to the durability of the tires under normal riding conditions, because I ride with guys on modern sport bikes. My tires typically last about 2k-2.5k miles and they are done.
However, if you want to know which is the best for sport riding, I finally have a definitive answer.
Hands down, the Pirelli Sport Demon is the best
tire for the CX if you are an aggressive rider.
Of all the tire's I have ridden on, it is the only one that has heated up, boiled, and peeled like a race tire.
In my latest side by side comparison, I spent two sessions on the Avons on the Eurosport, and one session on the Sport Demon on the 500 turbo at Infineon,
The despite having a 125lb weight disadvantage, the Turbo was more stable in the corners, more predictable, and was actually better on the brakes than the 650E.
Each bike got absolutely identical prep prior to the track day- brand new tires, EBC 69HH sintered pads (front and rear).
Here is what the Sport Demon looked like after one session:
There we go! Facebook worked.