Dont get me wrong, I think this is baller but as for desktop use, that thing will scream louder than a run away jet engine. Those fans are incredibly high flowing 40's, dual impeller, this means its likely also a very high fin density rad. Putting this in a desktop is likely going to end in more noise than the vast majority of people are willing to tolerate.
EDIT: Political correctness for the benefit of those easily offended & feel the need to hold others to their own standards.
Hey, look at it this way: if you have very very loud kids/dogs/animals/people in your household, you can both keep the noise out and reverse the fans to blow them out if they won't stfu
In all seriousness, 40mm server fans are hella loud, even when new. You did bring up fin density, and so I wonder if they increased (I'm blanking on the technical word) liquid pipe count in the radiator, which may be a bit of trouble for an Asetek pump (I don't own one, so my opinion here isn't the most qualified).
Also, I'm a bit concerned with reliability of liquid cooling in a server setup: despite advances in liquid cooling safety, there are many more points of failure than on an air cooler. Finally, I personally think this product won't really take off considering its niche status (1U server/SFF PC with proper 40mm fan mounts, very hot processor [otherwise why spend the money], probably kinda bad cooling, etc., etc.)
