I am currently running a CUmine 600E overclocked to 840 and my Alpha PAL6035 keeps it nice and cool (95 degrees Fahrenheit). Normaly this is not a quiet cooler but if you go
here and buy it bundeled with a 16.1 dBA Adda fan it is nearly silent. I have a total of 7 fans in my computer (Adda on PAL6035, 4 Panaflo L1A's for case, Antec PSU with fan, and the stock fan on my Prophet II) and I can only hear the computer up to about 6 feet away and even sitting right next to it I would say that it is . The HSF is by far the quietest component of my cooling setup except maybe the PSU. I would also suggest puting the fan on the heatsink label up so that it is sucking air through the heatsink rather than blowing, I think that this is the quietest and most efficient method.
Eric
edit: to answer your question about the gorbs....I replaced mine with this PAL6035 and there was a noticable reduction in noise. I actually thought that the GOrb was fairly loud compared with the rest of my system.