The Xspc kits are covered in some detail because they are almost the only decent kits available,
Swiftech are changing that wirth the H220 kits coming out soon but most the other kits from Koolance, EK, and even less well known chinese suppliers are unsuitable for one reason or another which is why they aren't recommended
for example some use really bad pumps, others cut cost by using aluminium parts,
only research will tell you why aluminium is bad for watercooling but we cover Xspc in the sticky because they are good,
many of us here started loops with them, myself included
Moto