Welcome aboard. Glad to see you like the Luxman. I really like the Luxman, it checks all the boxes for my type of sound. I really liked the Yggdrasil with the Gen 5 usb. I was surprised that it leaned a bit to the warm side. I may eventually upgrade to it and give the Lux to my son since it is a Japanese version and I may have trouble selling it for a decent price. Or I may just go for the T+A DSD8 once my friend brings his over for me to try in my system now that I have a computer that can do DSD512. I do have quite a bit of DSD recordings and they would be a waste with the Yggy.
Thanks - I am very happy with the Luxman... curious what filters you are using for PCM and DSD? Since I'm upconverting everything in Roon, I am using the 7th Order (CLANS) filtering in Roon and the D2 filter on the Luxman. Sounds really great to me. I got a really good deal on the US version of the DA-06 ($2k) and I'm happy not only because it sounds good, but because it matches my 509X integrated (ha). I am hoping I can sell the Hegel for more than I paid for the Luxman. Before I got the Hegel, I was seriously considering the Yggy, but multiple dealers were steering me in other directions (maybe because Schitt is only selling direct - but I wasn't going to be able to demo it anywhere so that was a factor in the decision as well). It does sound like if you're heavily invested in DSD it wouldn't be the best direction to go in.
Right now I am wrestling with the idea of selling my amp and preamp and going with a Luxman integrated or just sell my BAT preamp and buy a custom Don Sachs SP-14 tube preamp with all the upgrades and then wait and see how the Lux and T+A sounds with it. I am leaning on having the DS's preamp built and compare it with my BAT. I would have no trouble selling the BAT for $3200 or so with relatively new tubes and new Caps in the 6 pack.
I can't tell you how the integrated compares with what you have now, but I'm extremely happy with my 509X. Definitely the center piece of my system. It drives everything with total control over the music and is a great match with the dynamics of my Klipsch La Scala IIs. I'm also using my CL40 valve preamp for certain music... the 509X has a preamp "Separate" function that allows you to use an external pre (most would use this as a HT bypass I assume). But there is content that just really comes to live with the valve preamp versus the 509X pre - and that is no slouch, I believe it's the same preamp as the c900u. If you're hesitant about the class A/B in the Luxman, the 590X (class A) appears to be highly recommended as well.