CooLWoLF :
Definitely a dedicated GPU, preferably R9 class (if you're not looking at Nvidia)
What's your budget?
im at 450$ now starting with the apu igpu .. and will get a dedicated graphics in a month or so .. as soon as i get few paychecks
my build is
CPU: A10-7870k 3.9ghz
Ram: 16gb G.Skill sniper series DDR3
HDD: 1TB Seagate Baracuda
Mobo: ASRock FM2A88x Extreme6+ ATX Fm2
PSU: Crosair CX 600W
um and yeh im not looking into nvidia. i will be going with the R9 380 that Jerdle suggested .. i had that one in my mind with few others
i don't strive for the 1080p ultra settings and all, all i really care about is some games that i run now to run smooth at low-mid-high graphics .. which i believe this build will be able to go high on them .. because they don't require much of specs
but i'm upgrading from my junk laptop and going back into some gaming .. since i took off for a while. all i have now is this acer with core i3-2350m 2.3ghz with intel HD graphics 3000 and 6gb ram. not bad .. but doesnt run the games i play at low smoothly
sorry for long answer