Opinions: Delta FFB low speed vs. Panaflo

Ok, Just people's opinions here.

Which would people here generally prefer for a moderate noise-level air cooled system?

A. Delta FFB low speed 80mm (45cfm) like this: http://www.sidewindercomputers.com/del80ffb0812.html
B. Panaflo H1A or U1A 80mm (40cfm-45cfm)

Part 2:

A. Tornado 92 on voltage controller to 5-7V
B. Panaflo H1A 92 at 12V

My reasoning is this:

Is the motor noise of these high speed fans reduced enough at reduced voltages low enough to match the high speed Panaflos at 12V? Because I like the flow vanes that the Deltas/Tornados have, but am a little curious as to the noise generated by the motors, which the Panaflos have nearly none of, just air noise.

I think the Tornado at 5-7v will still be louder than a PAnaflo at full 12V. I have the 92mm Panaflos and they arn't extreme at 12V.

I say go with the Panaflo as you can still lower the noise to 5v which will be really comfortable on the ears!

But the sacrifice to temps would be fairly steep at 5V for a Panaflo.