Firstly you need to consider how much you are willing to spend and how hard you will be pushing the CPU (i.e. are you planning on over clocking if your CPU supports it).
Bottom end of the price spectrum is something like this
Will fit in the case without any issues what so ever but wont be an awful lot quieter than your current cooler.
Next up is something like this
A lot bigger but should fit fine (still worth checking though) and will be a lot quieter while allowing for some CPU tweaking if you so wish.
slightly bigger still is this one
This one should give you cooler CPU temps but may be a little noisier than the last one. Will still be quieter than the stock Intel cooler though.
I have one of the older Corsair closed water loops in mine, the H80i, and you can’t hear it at all. The PC still isn’t quiet though as my GFX card makes a racket
I don’t think I can justify 60£ on water cooling… I’ll be going with the Arctic suggestion as the noise is my motivator, I don’t think I’ll be overclocking (yet?).
I used a very unscientific method of putting a ruler against the MB to measure 17cm of clearance, so I hope I have the space.