So what is everyone's favorite string for fretless? Thus far I've had Circle K's rounds, D'Addario rounds, Sunbeams (rounds), Chromes (flats) and I'm digging the D'Addario rounds so far. I'm really looking for a nice roundwound, preferably nickels. I'm not too concerned about fingerboard wear and more concerned about tone. I'm open to groundwounds, but not flats. I dig flats, but not on my fretless. So what is everyone using on their fretless basses and why?