The main difference with the 780G is that it has integrated video. Now, the 780G is the best there is as far as integrated graphics, but if you have no need for it then I'd say save the 10 bucks.
I just ordered a motherboard with the 780G to use in a rebuild for a friend. He was using integrated graphics before (nforce w/ 6150LE) so this is going to be a major step up for him. I'm looking forward to working with this board and seeing what it can do. I've strayed from the topic a bit here, but the point is: if you're using dedicated PCI-e graphics, then IMO there is no need to get the board with the 780G.
Yes, the 780 definitively worth it
Barring the OP's ability or need to use the nice integrated video capabilities, what does he gain with the 780G for his $10?