I find it hard to believe none of you guys are Club GTI members!?!?
If you are you should know about Greenlight Insurance. They are brokers who specify in modified VW's especially golf gti's. They will charge no extra premiums for mods except chipping! And for my 8v they were ?600 cheaper than Tesco who had been my previous insurer.
They have excellent customer service and you can contact them on
01277 263030http://www.greenlightinsurance.com/You don't have to be a club gti member but if you are you get a discount as well. The company they got me insured through are Highway insurance but i don't think you can contact them direct and Greenlight find you the best deal.