Water cooling part selection is not the for the faint hearted. Takes hours of planning really.
Step 1) Complete parts list (and what you want to water cool)
Step 2) Choosing your radiators
Step 3) Choosing your pump/res
Step 4) Tubing size/type
Step 5) Fittings (2 per item in the loop, minimum, additional drain (valve) and fill ports are recommended)
Step 6) Water cooling blocks (This may decide Step 5 for you)
Step 7) Fans
Do a layout and see how long the runs are, order double the amount of tubing you need (hardline sucks when you make a mistake)
Plan your bends.
If you aren't bending, triple the fitting budget (or more) As you will need a lot of fittings to get around corners and line things up.
There are easier ways. EK sells a...