Time to get more serious with chassis this winter, trying to decide between the Cortex Xtreme Grip Street with torque arm. And the Griggs GR40SS with Torque arm. I believe this uses koni internals, so even tho I'd order the Cortex with JRi dampers, for the purposes of this comparison, all things being even with konis on both, which is the better system? I use the car almost exclusively for track duty, and hit 11 events this year. I do drive to track, no trailering options in Manhattan! Thx in advance