I would replace them with CL bulbs as the others burn out myself.
As for noise and flicker.. We have one right now (using up old bulbs) and it doesn't seem to flicker or make noise.
My concern with CL bulbs is are they bright enough. The one we do have is not, but I know they have improved tremendously over the years.
One thing to note, Mary.. they seem to be larger and can hit a lampshade if it's close. You might buy a couple and see how it goes. Oh and read this -