Are you crazy ubercake? There is no chance in hell an i5-760 is going to be the bottleneck. I want you to show me a record of someone's 2.8ghz quad core processor with turbo boost ever being maxed out on a game. His processor would be near the bottom of the list.
Not crazy. His CPU would be the bottleneck at lower resolutions with one or two higher-end video cards. This is well-documented.
Nothing against the CPU whatsoever. It's a great CPU.
Just saying... if anything will bottleneck anything with his current setup, it will be the video card at higher resolutions. As his video capabilities increase, the CPU would become the likely bottleneck at lower