Upgrading Cayin A88-T: what is next?

I recently purchased an A-88T from Cayin here on a lark. I am planning on keeping it (we have a second system to build) but am probably dropping it out of the main system. I have been using it paired with my McCormack ALD-1 w/SMC Platinum mod, and while it sounds nice and full, the detail isn't quite there compared with my normal amp (McCormack DNA-125 rev. Gold) and the low end definitely isn't as tight, as full, or as fast as the SS amp. Jazz and vocals are enjoyable on the Cayin, but complex orchestra and electronic/downtempo comes across a bit flat. The Cayin is a nice amp, don't get me wrong, but I am looking for a bit of that tube fullness without the trade-offs I am currently getting from the Cayin. Also, it perhaps runs out of steam a bit compared to the DNA-125. Speakers are Tyler Decade D1's, still breaking in at around 400 hours. They are musically pretty neutral, but full in sound, and put out a big, clear soundstage.

So, if I stay on the quest for a tube amp, what should be next? I am thinking a bit more power, more low end, a bit more detail, but still "meat on the bones".

FWIW, nothing against the Cayin. It actually exceeded my expectations, given the very modest price point. I didn't expect an integrated selling for $2000 new to be a world-beater. But, I assume one can get more for a bit more $. Any recommendations?