Thx for the anwser, I was also guessing the same since the D5 pushes about 1500l/h while the raijintek barely pushes 500, but I wasn't sure about the head pressure which it had. Regarding the laing setup, I was refering to using one or two ddc pumps.
A single D5 is a better solution than two DDC pumps and certainly better than a single one.
TBH, unless you really need to save on space, I wouldn't consider anything but a D5, it beats pretty much everything else in most categories. Even if you do need to save on space, EK's D5 Revo units are pretty small.