If you want to play games with a discrete there really is no point in getting an APU. The APU is good enough if you are going to use the integrated graphics but if you want to use a discrete video card I would avoid the APU as the weak CPU core will bottleneck high end video cards.
Yep, APU's are generally designed for people who does not have any plans in getting discrete cards. But then again, you should have a decent frame rate it's just that .. You will not get the "fullest" power of the GTX 660