I'd be interested to hear what someone with only a tower strut added thought of it. I agree with zeeper that the car handles very well stock. Obviously there is some compromise on ride comfort and body roll but it's not in a bad place in my opinion. My old MK4 Jetta had completly upgraded suspension (H&R sport springs and koni sport shocks) and it handled VERY well when I had the summer tires on it. It was however quite rough on bumps so given my experience there I don't think I'd want to do too much to the suspension in the impreza.