Hi Dave32007
Welcome here, and this is by far the best forum in my opinion!
I cant agree more, the DSG is fantastic. I would personally go for the 5 door if you have children or use the rear seats frequently (that sounds a bit strange when I re-read it!).
I have a 5 door BMP DSG and absolutely love it. I traded in a 2006 Audi S4 4.2 V8 and only miss the sound of the exhausts, nothing else. The GTI is fun to drive, easy to live with and as Jeremy Clarkson said on Top Gear, "Its all things to all men".
Good luck with the choice!