Ummm I would like to point out something Given you don't seem to know much about water cooling I would like to say a word of warning.
Water cooling can be dangerous if not done right. Water and computer parts don't mix and you could short out the whole computer if there is even a very small leak. You also need to have the space inside or out of your case for all the parts. before you go trying something like this make sure you really want to do it.
Even if you don't mess up the install you can always end up with a water block that starts leaking after a while. It really isn't something someone who doesn't even know what a water block is should try to do. This is also going to cost more then getting a after market fan that is quiet.
Water block - around 4139.
Heat Exchanger - $30
Hoses - $10
Pump - $40
Those are random numbers off the top of my head but their fairly close. For about the price of the pump alone you could go get a quiet after market fan.