I thought about it, but eventually decided against it. It would be rather pointless buying a lightweight car and adding weight to make it ride properly.
Once those Contis are worn down I´d go for a more flexible tire for daily use and just change them for trackdays.
Cornering ability of the car is absolutely fine for daily use (at least for me). For better tracking of the rear end on the track, I´d advise towards a fully adjustable ride, and adjust the rear camber and stabilizer to fit your driving style.