I'd always prefer vibration-free mounting of fans, but in case of the CPU Cooler it really shouldn't get noticeable until the (really slow moving)CPU Fan is the only thing around that could make noise...
Anyways, this cooler has not been modded by this site - it's just a review of a product.
You could buy it here
They have versions with SLK 800, SK7 and AX7 as well. I own their SLK 800 - a VERY good cooler, haven't seen anything that could compete with this until the SLK900 came out, BUT: their SLK 900 is equipped with an 92mm Fan, which is actually a little bit louder than the 80mm papst fan on their slk 800... there just aren't any 92mm fans around that are as silent as the best 80mm ones.
So basically anyone could do this (vibration-free mounting) themselves, it just involves some bending since the SLK800/900 is not 'big enough' to simply 'stick' a 80mm fan on it
if there are still questions about those german sites, try to PM/eMail me. And I see what I can do to clear things up.