The Asus Maximus V Extreme is an Extended motherboard and you have to be sure that the case you get and accomodate an EX-ATX board. If you are seriously considering this board and you can afford the price then you should get this board. It has so many deatures that other boards don't have that you can do just about anything that you want. It has a lot of Pci-e slots to put two or even three video cards and any other addon card that needs a full x16 slot.
It's the kind of board I would be inteerested in if I were getting an Ivy Bridge cpu. As you can see by ny sig I went with the Sandy Bridge-e and therefore the Asus Rampage 111 Extreme. I like having more options and features than I will use because it's better to have them and not use them then to not have them and want them.
So my vote goes for the Asus Maximus V Extreme. An i7-3770K deserves a high end motherboard.