I would like to know which CPU and GPU would match my gaming laptop in performance.
GPU: ATI Radeon HD5870
Also how would a i7-4770K with integrated HD4600 graphics compare?
The only games I paly currently is DOTA2, Civ V, Railroad Tycoon...
Dude, an i7-4770k would EAT that laptop. LOL There's nothing wrong with your laptop, but desktops have the ability to be MUCH more powerful. Any mid and high end desktop will outperform 99% of all laptops. This is because laptops have such limited space and cooling is always a huge issue. In a desktop, there's room to get rid of all the heat generated, but a laptop can't breath like that.
Any idea of how much you want to spend on the desktop?