Actually, there may be a free way to fix that too.
Many VGA cards (including 9600XT's) use PWM to modulate their fan speed. When the bigger, heavier, slower turning AC-Silencer fan is plugged into the card's fan header, the pulses often produce a buzzing or ticking noise.
Try plugging the Silencer directly into a molex power source, or your Rheobus, and I'll bet that most of that buzz goes away. You'll have to do a little ghetto wiring to get the plugs to work, but that sounds ilke something you can handle.
I can definately do that, i think, i mean after all, i did do the samething to mod my psu fans... but, that was with regular wires, the AS rev 3's wires are those tinnie tinny ones that may require some real skillz. Also, i really hate to risk my 1 week old silencer on a mod... arrg at least its good to know i didn't get a defective product. Oh and ghetto wiring rocks!
Update: I stuffed the case deeper into my closet; now its more or less at the very corner. It definitely made a difference, as it got reduced the whine noise even furthur, to the point where you have to stop and try to hear for it before you can catch a whisper. Oh and i've found that the whine noise is caused by the noise trying to escape the gaps in the closet, because there is no whine at all if i listen in the closet.