GPU Recommendation for mid range gaming pc

[ChrisLou]

MOBO: MSI A75MA-P33 FM2
APU: AMD A8-5600K
GPU: ????
RAM: Kingston HYPER-X 8Gb 1600mhz
PSU: Aerocool Strike-x 500w bronze 80+ (probably going to change this)

Any recommendation for best GPU? I'm building a mid range gaming pc.
The MOBO only supports PCIe 2.0

and also i've watched people on YT playing BF4 using only the IGPU of A8-5600k and gets decent FPS(30-40) on medium settings, is that for real?

Thanks in advance.

 

[lowriderflow]

the only reason to buy an AMD FM2 chip like the A8 or A10 is b/c it has integrated video chipset.
If you don't plan to use it, you're getting less CPU than you can get for your $

you'd be better off getting the FX 6300. also need t oswitch to an AM3+ mobo then.