If you intake you will get better CPU temps, but your case temperature will increase i.e. graphics card will go up some.
In my experience with a cooler like the H100i your CPU temps are going to be perfectly fine, where as your GPU is going to be busting it's hump to cool it self off. I would trade a couple extra degrees on the CPU for a cooler internal temp on my other parts, so I recommend exhaust on the radiator.
You might want to just try both methods and see which one you prefer.
Excellent ans i surely dont want my gpu to heat at all with sli and all Im gonna do the exhaust Thanks!!