I used my friends Drebel with vert grip and flash before. I thought it felt horribly unbalanced. The Drebel's cheap plastic body combined with the hefty battery filled grip and somewhat heavy lens wasn't a good feeling combo.

IMHO - I think Nikon's body construct is far superior to Canon in balance and durability.
_________________________
There are three kinds of people in the world. Those who can count; and those who can't.