I agree with Muad about the FUN taking quite some time to settle in. I had mine for about 2 months and it is now actually quite settled in the sound. The harshness was present even after more than 300 hours of burning in. I suspect that it probably took about a month for my unit to settle, despite running it 24/7 with a few power down cycle in between.
@slim.a, anyword about the new 24/96 module for the USB replacement? I was going to order one for my unit as I used the FUN to do some monitoring and initial mix on my work station until I read on the DAC-19 thread about kunalraiker having configuration issues with the chip in his DAC-19. It would be good to hear your impressions about this.