I don't believe that the Zalman 9500 will fit into the top of a Quicksilver without removing the power supply permanently. The 7700 may just fit, although I have not tried it. I think the aquagate is the best solution here. Even with this, I had to move the power supply over and fix it directly against the side wall of the case which just allows the side door to close. For really successful cooling, a dual radiator fixed to the bottom of the case would take some beating, still allowing a pair of hard drives at the far right. This will require the fitting of new hoses to the aquagate and some more Zalman coolant. You can buy hose from a good car accessory shop along with jubilee clips. Using a dual rad really does make a big difference, as I found out when I built my hackintosh, I think this would be the ultimate Quicksilver cooling.