Steve: Don't get the Tiguan unless you want to drive a balmange. I drove one and hated it. You don't need to drive a hearse just because you've got a kid. Effing stupid car for London.
Sensible choice: 5 door GTD or slightly less sensible choice 5 door GTI. 
Unless you want 4WD!!! 
Utter horsesh!t!
From the man who drives his GTI in 'comfort' because the rest are too stiff!!
A Sport/R line Tig is little softer than a GTI Golf...and better damped than a GTI in comfort!
I took one along some back roads to find out...they drive like any non-GTI Mk6.
As for the size...it's no bigger than a Golf...20mm or so in any direction except height...so hardly huge.