Just got back from a track day with HOD. No way in hell I would be interested in doing a track day in stock seats again. It's easier to control the car by a long shot. On another note, Bridgestone Potenza RE-11's are amazing.
Right?! Tell me it's not the single biggest change you can make from a drivability standpoint. Literally everything about the car got better once I could actually feel what it was doing.