I'm running a Conti UltraSport in the front and a Soma Everwear in the back. I skid quite a bit (I live in Berkeley, and there are some nice, buttery-smooth patches of asphalt that I pass by every day, however rare, and I can't pass up the chance for a nice skid). The Everwear's been doing pretty well, and I've gotten some pretty consistent mid-speed skids. As for wear, they hold up really well (~140 psi) and ride pretty well. However, the rainy season hasn't started yet, so I don't know what traction is like in the wet.