Oh, I misread it, u have a Range Rover, not a Rover, Phew!!!
As for DSG, everyone says they are amazing boxes, they give quicker gearchanges than we can do with manuals, so if I was in the market for a mk5, I'd definiatly go for one with DSG.
The Doc has had a mk5 GTI and R32, so he'd be the best person to know. He'll probably reply to this anyways..