What is everyone's opinion on the Skuttle model 60? My HVAC contractors are recommending either the Aprilaire 400 or the Skuttle model 60. It sounds like the Skuttle may be the way to go since I tend to be really sensitive to dry air and it can call the furnace fan as needed. I was also thinking that while up-front costs would be higher with the Skuttle, the maintenance costs would be less since pads don't need to be replaced. They also mentioned that I would likely have to run the furnace fan constantly (which would probably run up our electric bill) to keep the humidity up with the Aprilaire. Any insight on this?