Cheers Damian, the spec & colour selection makes a huge difference. Just had a look around my colleagues' Golf S rental - it's a horribly dull basic spec, steel wheels, no fogs, standard interior, etc.
I've had my GT professionally detailed and multi-coat sealed over 2 days (paintwork, lenses, windows, wheels) by an independent detailer NOT the dealer monkeys that slap on Lifeshine in half an hour. The Pure White seems brighter than the previous Mk 6 Candy White and the detailing really accentuates it further.
But have you convinced the Mrs yet on a GTD rather than A3?