I'm planning on buying a new graphics card this summer and I was wondering if I should get the 780 or wait until Nvidia releases the 870. Since (at the time of writing this) they haven't announced it yet, that's why I'm wondering. I have a 660 atm, but I really really like max graphics (who doesn't). Will the 870 be enough of an upgrade from a 780 that it would be worth the wait?