The motherboard is a ASUS P8P67 Deluxe, power supply is a 750 watt Silverstone, and I'm probably just going to use one 1080p television screen as a monitor.
Although, what would happen if I use an i7 2600k or a GTX 560 Ti SLI? And, what would happen if I just use one GTX 570? Would the GPU bottleneck the CPU, then?
Two GeForce GTX 560 Ti in 2-way SLI mode will give you on average a 28% or more performance advantage over a single GeForce GTX 570 when running at 1080p.
The GPUs will be the limiting factor in terms of frame rate because using a more powerful card like a GeForce GTX 590 will still result in an increase in FPS.