Why do you feel the need to upgrade? The 3570k is a great CPU and the motherboard you have lets you easily overclock it. The new Haswell CPUs require a new socket, LGA1150, so you'll also need a new motherboard. The rest of your components should be fine but if you have an OEM version of Windows, it'll need to be reactivated.
Besides that, you're good to go, but I don't see the point. Stick with what you have and overclock if you want a performance boost. Don't waste your money on a CPU and motherboard that will offer a meaningless improvement.