RulesSpew :
enemy1g :
The AMD equivelant is the r9 280x. Both are about equal, either card can take the performance lead, it all depends on which game. But as it is now, the GTX 770 is still a really solid card. If you're thinking about waiting, that is fine too, as the next gen Nvidia cards should be out this year, and I'm assuming AMD will follow suit.
I'm also doing a lot of video editing with After Effects and Sony vegas, would NVIDIA affect the performance in this programmes?
280x are rebranded as I heared..damn you AMD!
Actually yes, the CUDA cores on the Nvidia GPU's can really help in video editing and rendering applications, so if that is a big deal to you there is another reason to go Nvidia. I'm not hating on AMD though, their products are good as well, just for different reasons like Mantle, better OpenCL support, much better crypto-currency mining capabilities, eyefinity, and other small things. Of course, Nvidia offers some similar things as well.
It's basically personal and budget preference. ATM the 280X is rougly $400-450, so there is no reason to get that right now. And no, I do not forsee a price drop in the AMD GPU's for a while now, at the very earliest the launch of Nvidia's new GPU line, which could happen between late March and September, maybe even later, no one knows.