this is by no means an exhaustive list of what you will need but it will give you a feeling of what is needed and the costs involved.
you also need to add in coolant costs, dyes etc.
cost of connections may go up/down depending on how many you need for the set up you choose.
also factor in cost of tools for working with hardline tubing - heat gun, cutters, chamfer tool etc etc.
finally - time, you need to factor in a lot of time if this is your first venture into watercooling. hardline tubing is much less forgiving than soft tubing. hardline takes a lot of practice and patience. you will balls up the first few attempts, without doubt.
my first foray into watercooling was hardline, given what I know now would I change to soft tubing if I had to start again.....nope, for me hardline tubing looks far superior to soft.
i see so many rigs in the project logs thread that look gorgeous during the build stage but when finished the soft tubing destroys them totally - though that is obviously subjective.
finally, finally, what are you trying to achieve by watercooling just the cpu (i assume that is the case going by your op) noise reduction? better cooling? or simply aesthetics?
if it is purely noise reduction, you're in for a shock - without cooling the gpu you will see very little reduction in noise levels.
if it is for better cooling, then yea you're good. a custom cooled kit will far exceed the cooling capabilities of air or aio.
if it is for the aesthetics, again you're good. have a look at some of the hardline rigs in the project logs or even just google for inspiration.
and finally, finally, finally......plan. you need to properly plan the layout/flow you want. draw it up in something simple like paint and post it up here long before you start for some advice/critique.
My basket at Overclockers UK:
lol