I agree with you on that, broken-in D'Addario Chrome flats.
These strings will respond very nicely to periodic cleanings with a good string cleaner/lubricant, like GHS FastFret or Dunlop's Ultraglide. What you get is a pretty nicely balanced spectrum of tones, from the fundamental through the harmonics with good sustain.
Thanks for the tip. I love 'em and expect they will be my go-to flats for a good long while.