Yes, the system will support a 2x4GB mem kit. That is the max.
It would be better for you to get a 1066 or 1333 MHZ kit, since while downclocking the 1600MHZ kit you will relax the timings which will be noticeable. However the difference between 1333 and 1600 (at the same timings) is pretty much imperceptible.
So, my suggestion. Go with a less expensive kit, that is designed to work with your MB.