best way to lower humidity in home
A little condensation is not bad. You will always get some with shades and drapes the limit circulation.
You might have a house that is too tight. Mine has a fresh air intake that feeds the furnace room. It is not sealed so I don't know how it effects the inside humidity. From experience, I know that even outside cold air at a high humidity PERCENTAGE does not really have much moisture in it and can dry out the interior when it gets inside. - A far cry from the southern winter air.
My furnace (Bryant) is a new 80% (could not justify a 90% model even in Minnesota), but it does have what is advertised as a "variable speed" D.C. fan. It certainly has a mind of its own. I am so pleased with the temperature uniformity (2 story with open split entry) and summer humidity I get by running it 100%, I have not bothered with the details.
Dehumidifying below about 40% will cost you, plus you may have to bump up the thermostat a bit because of the dryness.