Yep, modern dimmers are needed to go with modern lighting or they will buzz like a chain saw. I had old-school dimmers everywhere in my house and in many cases I just changed them to a switch if I didn't use the dimmer much. My house is now about 1/2 CFL and 1/2 LED with only a few incandescent fixtures left that rarely get used. It's been a 5 year learning curve for me but last month my Edison bill was $38.
2700k is the magic # for lighting color to pass the wife test.