Hi guys my names nathan and im 22 and live in wales, i currently own a 2009 1.3cdti vauxhall corsa d, i want to upgrade, im looking at either a focus st or a mk5 golf gti, would like a bit of info on the gti if you guys could fill me in, such as prices? what sort of mileage to buy, mpg, tuning and common faults and reliabilty, would be grateful for any feedback :)