Most of those should be quite quiet. I know if I do a few things, my computer is basically silent. Those things are:
1. Reducing the speed on my Tt UFO (cpu fan). Easily done through back panel voltage control.
2. Reducing the speed of my back 120mm fan. This one's tricky since there's no control, but I've got a 7V line I can connect that to which would definately help.
3. Reducing the speed of my 40mm NB fan. Another tricky one, came with a voltage regulator, but I didn't install it. Would need to install that if I want to do anything about this one. Not sure about the sound it currently produces, cos my 120mm fan produces more noise than this one.
I'm currently running 8 fans as well:
CPU fan (Tt UFO)
Graphics fan (Zalman VF700-Cu)
Top 80mm
Side 80mm
Front 120mm (for HDD, had a nightmarish episode where my HDDs slowed to a crawl, transferring data at 1mb/s. As I transfer data around all 3 networked computers alot, its unacceptable).
Back 120mm
PSU 2x80mm (changed to something more powerful, yet still silent).
This setup I must say is not for everyone, I can say I have no warranty on anything but RAM (which came with its own heatspreader). Assuming its still within warranty time (my X800XT is).