@bigtwin Your point is well taken. I’m sure that if there were no other options, I could live happily ever after with the H590s or the H600s internal DACs, because on their own merits, they do sounds quite outstanding. Heck, for years and years, well before outboard DACs became so popular, I immensely enjoyed the DACs that came with my high end CD players without a second thought. So, I hear where you’re coming from. I’m sure that the internal DACs of the H590/H600 will easily equal or outperforms many, many higher priced stand-alone DACs on the market. However, there’s good reasons why so very many well versed audiophiles have opted to go with external DACs. There are levels of proficiency, at various price points, in all things high end audio and DACs are no exception. Based on my experience, extensive listing sessions, comparison after comparison, etc., I felt that the DAC of my choosing, consistently outperformed every internal, and most other outboard DACs I compared it to, even some that were far more expensive, so I ran with it and never looked back. I don’t know about you, but I don’t want to spend my whole life doing a/b comparisons. I just want to lay back, be content with my audio system and enjoy the fruits of my labor. At some point, you have to trust your own ears, be confident and content with your audio choices. I’m not one who enjoys digging deep into my wallet every time a new shiny penny comes along. My audio purchases are intended to be for the long-haul. Despite the constantly changing technology of current DACs, I’m confident that my Ayre Acoustics QX-5 Twenty Streaming DAC, at it’s elevated level of proficiency, will stand the test of time, and will be with me for years and years to come, simply because, to my ears, it outperformed most everything else (within my budget, whether new or pre-owned). Happy listening.