Brentacre?
I second this, im 23 and will have 3yrs ncb at the end of the month. Direct line renewal is £1800 (£150/month) and insurance is currently at £192/month although ive already paid my last installment.
Brentacre will insure me for £1089 which is over £700 cheaper with quite a few mods to engine and exterior
I have a bmw E36 328.. and incomparison i was gettin quotes of £6000+ from tesco etc
EDIT: also too add my excess will drop from £750 down to £150 with bretacre