Have you tried GreenLight insurance? I changed to them earlier this month after they quoted me over £100 less than the renewal from my insurer at the time (Bell). Exactly the same policy (better in fact) and if you're a member of www.uk-mkivs.net they'll give you a bit of discount.
I'm 27 with 10 years NCB and GL quoted me a little over £570 FC.
Also depends whether you pan to mod your car or not - and if you do there are very few that offer like for like on mods in the event of a claim - I am with Greenlight and as mentioned above I got the Uk-MKIVs discount. Great company :151: