before we start this thread you have to do some research on watercooling http://www.tomshardware.com/forum/259900-29-watercoolin...
you have to be aware of the cost, risks and maintenance that comes with water cooling
pricing WILL be around $300 for a good loop and if you don't do your research properly and maintain properly, you WILL get leaks and algae developing in the loop
please RESEARCH this.... then if you still have questions come back
I've made this system:
Radiator: Phobya G-Changer 360 Bundle mit 3x Phobya Nano-G 12 Silent Waterproof 1500rpm Multioption
CPU Block: EK Water Blocks EK-Supreme HF Acetal+Nickel universal
Reservoir: XSPC Acrylic Dual 5.25ö Reservoir for Laing D5
Pump: Alphacool VPP655 - single edition
Tubing: 13/10 mm tubing + hoseclamps and fittings
If you buy the components one by one, change the pump for a Swiftech MPC655 and don't forget the Silver KillCoils for your loop. Distiller water or di-onized water are good for keep the block and components safe.
With the Rasa pump, I wouldn't run more than 2 blocks and the 3x120 on the loop. I think its decent for a single block loop, but once you start adding more, not sure how strong it is. You could easily replace it going forward with something better, though.