Im with Sky insurance. Very good and always willing to beat any other quote you can get.
Im 25 with 7 years NCB, 0 points staying in a medium crime rate area with the car garaged at night and im £580 on a 08 WRX Hatch. Thats with £250 excess aswell.
The next cheapest for me was Admiral/Elephant, and had some crazy quotes aswell of £3000+.