I've heard that there have been some problems with the SmartLinc switch. A better alternative, with similar advanced features, is the PCS SceneMaster Switch. Doesn't look like it would be appropriate for a fan motor but it might be a better option for incandescent loads. Just got a price quote of $63 yesterday from Jim Wilson at Mountain Vista Supply,
[email protected]A cheaper option for controlling the fan is the Leviton Inductive Dimmer switch. Even cheaper is the HomePro version.
The hum problem will exist regardless of the switch you choose. They all control the voltage in the same manner which is what produces the buzz in all but the most tightly wound motors.
Regards,
--LB