I currently am using a fx-dac X6 with an upgraded op-amp (burson v5i-D) through massdrop. I use it as a headphone amp to drive my hifiman he4xx and a beyerdynamic dt770 250 ohm. Recently, I found the urge to setup a 2.0 system using my current speakers (pioneer fs-52) and old JBL CF-150 I picked up at a garage sale. So I bought a class D amp xtz edge a2-300. I use my dac fx-6 in passthrough dac mode via RCA with USB as input to my MacBook Pro for Tidal and other streaming services. My goal is to get a DAC that has support for bluetooth and good pre-amp section to replace my fx-dac X6. With all the tests done here and ranking for the SINAD rating, do I use that to narrow down my options? I see also that most DACs use Sabre vs. AK vs. Cirrus Logic (on X6). Currently, I'm happy with the pairing of the X6 with XTZ. Not sure if the Burson is helping improve the X6 for the output section. Anyway, I want to replace the X6 for another DAC to pair with my setup as I'm going to use the X6 for my headphone only. I'm willing to spend up to 300 CAD. Some have recommended to pair it with a tube preamp which is again another spend. I just want to get good value and enjoy listening to music and not get hang up with specs.