Another alternative for the liquid cooling system is the Antec Kúhler H2O 920, which one would you recommend? Also i would really appreciate recommendations for the other components mentioned above. My budget is £1000.
Find a cheaper board like the Asrock z77 extreme4 and add a $25 - $30 wifi card to it. Your going to end up with better wife and for a lot cheaper. Change out the psu to something solid like a Cosair 650w or 750w psu or XFX which is also manufactured by Seasonic and then look up the benchmarks on that H80 cooler and see if there is anything comparable temp wise for cheaper. You can find that Asrock board @ Dabs UK for 110 quid.