if your thinking of the matrix, there is no WB as per date.
i have 10/13mm tubing ( 3/8"ID/1/2"OD ).
compression fittings is a safe way to go if you do clean and straight cuts on the tubes, but do remember they are larger then the normal ridged fittings.
what sort of rad/rads are you planing to use?
EK and XSPC have a few good ones, you can get ones you can add lights on them ( 3mm diodes )
or normal whit no lights+++++++++.
http://www.frozencpu.com/cat/l1/g30/Liquid_Cooling.htmlhere are a few things you can look tru and see what you think will fit on your build.
radiator, cpu block, gpu block, fitting, and the pump + res you have found.
and a coolant of your choise ( UV coolant dont work good so )
sit down and draw how you would buiuld your loop that way you will get the picture of what to get, fittings, drain, fillport ( unless theres one on the combo pump/res ) , length of tubings ( more is bether in case of axidents ), what fans to get,mabye a controller if thats an option since the fan headers dont push mutch out on them, push , push/pull or pull config on the rad/rads.
get fans that have good airflow on them ( not thinking RPM here ) but how mutch air they push.
get fans you can controll the voltages on, get ones whit low start voltage on if possible, that way your fans will not go on full blast all the time. before adding the radiator to the loop, do flush it, probably whit a filter connected to the flushing loop or what ever you do to prevent dirt coming in to the rad again.
the cpu and gpu block have smal groves on them so they can get clogged by the dirt if you dont flush it. ( typos are made )