The Sport Attacks are absolutely fine for CSS, unless they're seriously worn or flat-spotted, which applies to any tire. They're comparable to Q2s anyway, and the school is not about sliding around the track.
I dragged the *fairing* of my ZX-14 with *Road* Attacks on it.
The only reason to prefer Q2s would be that's the tire they run on the school bikes, so they have a lot of experience with pressures, setup, feel, etc. But that's not enough reason IMHO to switch tires if yours are still in good shape.
KeS