Water cooling (primarily the aio models) is IMO noisier than a decent air cooler unless you go for at least a 240mm & replace the fans - which will end up costing a lot of money.
Hopefully this link is acceptable to post - the decibel level & performance on an over clocked 3570k will show why I recommend it
http://www.eteknix.com/raijintek-pallas-low-profile-cpu-cooler-review/5/
You certainly will never hear it above your case fans.
http://www.eteknix.com/raijintek-pallas-low-profile-cpu-cooler-review/5/
Octavecode - corsair state 160mm cooler height
Dark rock state - 166mm
Just going by the specs above -mate.