Im 19 and have a GTS and Famous said they would insure me for around $2500 which is the best i can find so far so im probably gonna go with them. The car is a non turbo but (but will be getting a turbo when my insurance goes down), so i dont know if they will insure you for a turbo but im pretty sure they will if you have a clean record.
Tell us what you find if you go through a broker coz i was thinkin about doing that aswell:)