Hello, I decided to purchase the Sennheiser HD599. They were on sale for 100 bucks, I really liked the sound since it's not piercing or extremely bright. Also tried the HD560s, which had a terrific midrange but the trebble was to much for me. I'm listening music through Tidal and my local library, mainly 16/44.1. A few months ago I purchased a dongle dac (Hiby FC1), before that I was using my S10e (Exynos) as a source. The volume between this last two was pretty similar. However, I've been reading about the marvelous LG V30 Quad dac and MQA support. I bought a used one for 200 bucks, to use it only as DAP. This has the highest volumen and power. The thing is I don't notice a night and day difference between the three. I did some quick test and I think LG V30 is a more detailed. The thing is I can still return the LG V30 and buy somehing else, for example, another pair of headphones with a different sound signture. I have heard good reviews about the Zorloo Ztella, and some chinese DAPs. I'm really concern about this, I just don't want to loose money on marginal and barely audible differences.