And it is really a difficult topic...
If you're really a Purist Guy, you'd even consider that the best size is the classic size...
If you begin to prefer the GT, then the door is open to the XGT...
The Squadra is another topic, as the shape of the case is a bit farer than the XGT, compared to the original Reverso from year 1931...
But I won't be the last to say that GT Cases are not nice!
Best.
Nicolas