there good cars mate but the 1800 115ps engine is a bit lacking in the power department.
good economy and the engine will go on forever if looked after
mk6 shells are quite good with rust, mainly rear arches and rear spoiler mounts are the places that go- should be minimal on a looked after model though!
first thing to change is the brakes as there crap on the gti along with a strut brace to stop the wallowing- i've a had a couple of mk6 si's which is essentially the same car so also look at them aswell but stick to the 1.8s- just no half leather or spats/sideskirts