I cant really comment on the Silver Arrow as i have never owned 1, but i disagree with you stating that its an absolute pain to install, i personally found the Frio very easy to install on the motherboard.
It is loud when you have both fans spinning @ 2500rpm, however on the lowest settings with 1 or 2 fans, it is like any other CPU cooler.
I would like to see a comparison between the Silver Arrow and the Frio temps wise, i think the Frio is extremely unrated on this website and in general.
My view a fantastic cooler that is also cheaper than the Arrow.