FlareTech :
i would like to overclock my cpu to atleast 4.5 and I yes fan noise is a concern. I will be putting the radiator as my exhaust.
Okay well unfortunately, you will need to make some compromises and sacrifices between the three: space, cooling performance, and noise. First, the noise of a large air cooler is similar to a high end closed loop cooler at load when the water cooler is in the same temperature (read: silent mode) comparisons and not overclocked.
However, a closed loop cooler with a 120-140mm dual-fan radiator (like the Kraken X61, Corsair 100-series, and the CM Nepton) will be much louder than a top tier air cooler under overclock load.
Then of course, a high end air cooler is a monster in space needs. Long story short, you aren't going to get a quiet system with a bunch of internal space and overclocking a Skylake to 4.5GHz.