[airspirit]

Okay, you want no fans? Take what you have now and watercool your PSU. Cut a vent on the top of the case (grille is more like it) to allow hot air out. Put heatsinks on every black&square component in your box, and pray. Seriously, an undervolted Panaflo L is inaudible, and being that you are using an insulated case, it would be foolhardy to cut out all fans. The reason is that you will be getting minimal heat transfer out of there. If heat is being generated faster than it can be released (I hope your chimney works), you will fry your PC.

Here is a wacky idea: Get yourself an 80W pelt and cut a hole in the lower area of the case (as near the bottom vents as you can). On each side attach a Zalman Flower cooler, one inside on the cold side, and one outside on the hot. Perhaps it would cool the inside enough to make this a viable solution. By keeping your flower away from the components inside, you would have negligible risk of condensation. Similarly, the cold air at the bottom would hopefully also help in terms of making your chimney more efficient. This would require no fans at all. The side containing the pelt element would need to have a good foot of open space on that side of the case.

That's the only other idea I have ATM. If your PSU is buff enough, you can just plug the pelt in as is. You will HAVE to watercool the thing to go silent, though.