I'm helping one of my relatives build a new PC and he wants it to have custom loop liquid cooling if possible to overclock his 3930k (just a cpu loop) and have a quiet system, so I come seeking advice. I've installed aftermarket air coolers and "pseudo water coolers" such as the h60 in the past, but I've never actually build a true custom water cooling loop, and am thus excited and a bit frightened simultaneously. I see there are all in one kits available at retailers such as frozen cpu and performance pcs, and would like to purchase one to get started (due to ensured compatibility of parts). First off, is this a good idea, or should I buy the parts individually? Also, does anyone know if there are any reliable/good brands? I was thinking about getting an EK H30 kit with 360rad(there's copper and nickel....which is better?). But I see there are other brands such as XSPC and Alphacool. Also what additional items will I need to buy? I heard Additives/biocide are necessary? And some decent fans such as those new noiseblocker eloops? My budget is really anything around $250 (for the liquid cooling+additives+fans) Thanks so much for any advice on the matter.