Even though you have no claims your still a young driver trying to insure a group 20 car. Once you hit 25yr old with a clean record and no claims against you it will come down. They still want around four to six hundred quid for my dad to insure an escort cosworth and he has 37 years driving experience and zero claims against him in this time. Been with current insurer for over 10 years. So dont expect to get it much lower than you have been quoted.