BTW the Adda 1212LB is used by Lian Li for their high end V-Series cases, and by Seasonic for their high end 500W/600W PSUs. I got mine with the Lian Li :P
Here are the specs
adda 1212LB:
1800 rpm
72 cfm
pressure 0.095"
34.4 dBA
Nice noise/performance ratio in my opinion.
The Delta i cited is comparable to the Panaflo Bill is using for his tests (and yes i was surprised to find a 'quiet' fan with a Delta label !)
The best thing to do is what Bill said: buy several fans, compare them, keep the best according to your tastes, sell the excess
About fan controllers it's to be noted that Papst fans dont like PWM at all, they produce a hum. An adequate controller would be the m-cubed MiniNG (which is also adequate for Laing pumps btw), it's smaller than their flagship T-balancer controller and less expensive. It has only 2 headers though (still adequate for 1-fan systems :P) and you can choose between PWM and analog. It has a proper heatsink so it won't fry in analog mode
