Check out these guys - they give you real options.
http://www.zalmanusa.com/usa/usa_index.asp
I have two fans in my computer right now that are bigger and slower and thus don't make a lot of noise if any. I haven't bought quiet hdds yet so that is where most of my noise is. I also have thier big CPU heat sink on my CPU and it works great with the two case fans and the speed controls to keep the speed down. If things heat up I can turn the fan speed up to adjust the temp inside.
http://www.zalmanusa.com/usa/product/view.asp?idx=33&code=005
Works great! Copper is the key as it it has the best cooling properties.