Got the insurance renewal through, the quote wasn't what i'd hoped for to say the least!

Firstly I know, 23 yrs young + 3.5L = £££££. However i'm wondering if any of you out there are in a similar situation and/or can point me in the direction of a good company to try??! I've tried lots and lots of different ones on the internet but i'm getting a bunch of ridiculous (£2000+) quotes... But i know there's bound to be some out there specialising in our types of cars.

Changing the car is out of the question of course, I love it too much!

Oh and does anyone know what the alarm/immobiliser system in my car is called (i.e is it CAT1 etc?) - its the full closure alarm + immobiliser with OBC code.

Any suggestions GREATLY appreciated!