Hello. I am looking into joining the amazing world of pc gaming. I'm coming from a console and I've already played a bit of games on my laptop. What is the best gaming PC I could build? My budget for building this gaming PC is $300-$400 (the cheaper the better for me). I already have a power supply and case. The case is a NZXT Source 210 and the power supply is a Corsair CX 430W. Please and thank you in advance. All help/advice is appreciated.