yeah tescos are good and im with Norwich union at the moment, paying 420 fully comp on my GTi and thats with 4 yrs no claims and im 22
Age helps ALOT and no claims bumps it down abit, i think when your another year older and got another years no claims it will come down 100-200, but right now i think you'd struggle to get it below 700 to be honest!
Try confused.com aswell, it will search through loads of companys for you and return the results cheapest/highest in about 1minute
Let us know how you get on