The very first time i used a Jaguar XJ220 (wanted something easy!) and i've done it with a RUF 3400S the time after. I've been thinking about doing it with an Impreza Wagon next time, just for fun.
Basically anything with about 300hp, or more, will be fine for this cup. If you don't want any challenge, try something like an XJ220/Ruf RGT/GT-One on Super Slick tires.