I've been lurking around DAC threads, and I have a query. I'm looking to upgrade one of my DAC's, the Audio GD DAC19 DSP, which is PCM1704 based, and single ended. I am looking at the ES9018 based NFB-1 which is a full balanced DAC, to go with my balanced NFB-6. While Kingwa has assured me that the NFB-6 can balance the output of the DAC19DSP, since I am using ACSS connects, I do need a bit more dB level, and was wondering if a discrete balanced DAC would be an upgrade in terms of SQ. Any comments, especially given they're based on two separate DAC chips?