to the forum and enjoyt
2 main thing to look out for is Clicking Rear Axle and Skipping Bose Head Unit.
Things that are possibly missing that should be there is phone cradle (in the armrest). if your lucky you might get the adpator that goes with it. This is what connects to your phone. Latest ones are bluetooth and come standard from MY06 onwards.
There are only 2 specs. GT and Non GT. Many would argue that a GT is not worth the extra money but it does help massively come re-sell time.