nah your cool mate . im only giving you other options im not saying that is bad.. just a hassle.. if hes a noob is it wise getting water.. im sure he'll be more then impressed when he can max his games out and you 2 have a wicked time fraggin noobs. pop a quad in there save the hassle.. just keep saying to him.. 4 COOORES MAAN!! hehe FUUUTURE.... PROOOF *homer voice*
a good OC can be achieved with a good air cooler.. watercooling your pushing extreme. not really necessary.
Its up to you man. goodluck with the build.. he'll love it