I have several 80x25mm Sunon Maglev (the low speed version KDE1208PTV3) and I've tried them both as case fans & CPU fans. At 12 volts, these fans are somewhat noisy but the pitch of the sound (from the motor) is quite low and a large portion of the noise is actually the "whooshing" sound of air exiting the fan blades.
I can tell u that the KDE1208PTV3 is louder than the coolermaster rifle-bearing LED fans at 12V but cools my stock 2500+ 2 degrees better than the coolermaster (on an ALX-800) despite it's lower fan speed (2500RPM, not 2300RPM as advertised vs. Coolermaster's 2600 rpm, not 2500 as advertised). I had no experience with the L1A
At 7V, the Maglev is quiet but still audible (it makes a low wuuuuuuu sound).
At 5V, the Maglev is very quiet and you have to get pretty close to your PC case in order to hear (it makes a low zzzzzzzzzz sound, and it's not the snoring sound you hear at night
Right now, I am using these fans as my intake. If you use them as exhaust or for the CPU, the Maglev would sound quieter.
I've tested my low speed Maglev against the Coolermaster Rifle-bearing LEDs and the Vantec Stealth for vibration and the Maglev bested both, as it made the least amount of rattling when mounted on my ALX-800. (The Stealth was the worst of the three) The levitated fan hub does makes the fan vibrate less.
If you're looking for some performance but still relatively low noise cooling, you should consider the low speed Maglev (especially as CPU fans for the Thermalright heatsinks since direct fan to metal contact is involved). The Maglev at 5V is nearly silent but it might not be quiet enough for some of you. Also, if you living in BC or in the Vancouver area, you should get them from Anitec (http://www.anitec.ca/?mode=product_detail&pid=389
) for only 3 bucks each!!!! (for the 3 pin version that is) I bought 4 & had absolutely no regrets!