That's what I'm looking for too. Maybe I'll end up using the 2000W PSU and be very careful about picking quiet fans? Not sure.
I'd still love to hear how to add the two fans to the top of the 2880w PSU I have right now. That might solve the problem entirely.
Keep in mind it's still a server PSU so it will not be quiet. But yes it's more quiet then that beast of 2880w server PSU.
Most server environments noise is not a big deal... so most server PSU's quiet was not a concern specifically on higher wattage ones.