I’ve owned four Lumin streamer DACs, and only the T2 and D2 would I remotely describe as brash or harsh. They both exhibited a haze or glare. By contrast, the X1 is wonderful and won out in my comparison to the DCS Bartok (non apex). The T3x I added to a second system and it sounds like a mini X1.The T3x did take time to settle in, and care is needed when choosing the SFP module, as most sounded very brittle and bright, whereas the Finisar was great but took a day to break in.
A longer thread here is helpful: https://forums.stevehoffman.tv/threads/fun-with-the-wonderful-new-lumin-t3x-streamer-dac.1219258/
I listened to Aurender and it was nice, but I felt not quite comparable to the Lumin.
I considered the Sonore early on but it is not plug and play like the Aurender and Lumin.
Lumin’s support and updates are phenomenal- they continue to update software for 10+ year old components. I’ve had zero complaints and updates for both are a breeze. Works great with Roon too, but the basic Lumin app is great and sounds great too.
I am not a fan of Schitt gear. My demos of their DACs and phono stages were not especially impressive. They have fans of course, like all gear, just not including me.
My main gripe with Lumin now is that tariffs have increased prices a bit high, but the used market or a demo is a worthy consideration. My D2 was used, and my X1 was a demo, purchased for a very reasonable price (and traded in for great trade in value).