In all the cars i have autocrossed, my Escort running in HS was the most fun and i was always in the top, except when i ran out of gas, then i only got 5th out of 10 cars. I had Yok AVS ES100's and Tokico struts, the car was light, and could just dance around cones. The Mustang is big and heavy, but you can steer with the rear of the car and that is nice. I think the Contour will show on the more open faster tracks than the tight slow ones, and my Escort is the other way, but i am no longer racing that now.
July 1st will be my first run in the Contour, GS here i come.