Yeah, I'm up to speed on air pressure but I'm no convinced about having a top mounted radiator with intake... surely I'm just the pushing cold air through a rad and making it hot. Then pushing it downwards into more rising heat from the rest of my system and resting a massive hotspot? Does the top have a filter on it for intake then? I'm assuming so as otherwise your claim regarding dust might be hard to believe.
From what I've seen from various testing, radiator temps are not very often effected too much by position, and my cpu has been nice and cool under load on my current setup whilst have a top mounted 240 rad so I'll stick with it.
I've done some research and it looks like the coolermaster and cablemod brackets work best but they are sold out everywhere with no clues as to restock dates. Any other suggested brackets? (My card weighs 1.6kg)