Hi Rob and welcome to the forum.
Firstly good choice with DSG, you wont regret it.
Make sure it has had the recent ECU update, not sure if it affects your model year, but worth asking.
One common fault with Golfs in general is noisy power steering at slow speeds. If I was you I'd drive round in tight circles slowly and see if you can hear anything.
Make sure the tyres have a decent amount of trend and all four match.
One of my regrets is not getting factory fitted Bi-xenon headlamps, as these can't be legally retro fitted (no matter what some people will tell you). This may not bother you, but a nice thing to have.
Are the alloys in good nick? If they are 18" and scuffed, very expensive to get repaired, if 17", easier and cheaper. This is because the 18" wheel has two tone paint, and have to be sent away to be repaired, and so cant for instance be repaired by one of the mobile repair guys, such as Chipsaway.
Has it been serviced recently and what kind of servicing is it on, time and distance or long life?
I say this as my car left the dealer won long life, i.e. 2 years and I have since found out VW changed their minds with regards to how often a high performance car should be serviced and now suggest they are on time and distance, i.e. 1 year.
Can't think of anything else, but I'm sure everyone else will chip in.
