Time for a change in preference - and it's not for the Calais either.
So - do you REALLY need a wagon? If yes (and you want to stay with Ford), why not check out the
Mondeo Zetec wagon?
It has (heaps) more space in the rear (2163L vs 2000L). The interior is bigger than it may seem from the outside. The rear seating has ample leg room for really tall people. Fully adjustable seat, pedals and steering column means perfect seating position is actually possible!
The interior quality & design is even better than both the FG & VE.
Mondeo
Calais
It is better on fuel (2.3L 4 cyl. 6spd auto - 9.5/100k vs 6.0L V8 AFM 6spd auto - 12.6/100k)!
Ok, so it's not quite a V8, but it's still great car to drive! Handling & ride on par with Calais easily!
Otherwise - G6ET all the way! lol
Hopefully I have been of assistance...