Looking for a new integrated amp

I'm going on two months with the Rogue Sphinx V3. No noise issue. Strong performer. Very musical.
Very capable with delivering sonic clarity, detail, and presence even with a 85db sensitivity monitor speaker. In fact, these speakers have never sounded better (and they have had a number of suitors).
Solid build quality. Very nice feel on all the controls. Smooth feel, precise response to input. The 'skeleton" remote is all you need.
Completely analog, One of the main reasons I chose it. One of the best audio values I have purchased in the last 50 years. And made in the US.

Regarding your post, check out the Belles Aria.  It may be just what you’re looking for.

+1 for the Belles. 

Good quality Class D amps these days are extremely quiet. I have 4 from 3 different vendors and all are dead quiet. Early Class D amps were sometimes noise prone but most makers have resolved that issue. Good chance Rogue has as well with the Sphinx. I would consider that amp or the bigger Pharoah as highly rated contenders. Tube preamp + Class D amp is a match made in heaven from my experience delivering the best of both tube and SS sound together. 

I just purchased the M5si, really enjoying it. Very clean in presentation, lots of detail. I think it does have a nice richness to the sound. Compared to a class D Purifi amp I had, it strikes a nice balance. Lots of power. I’m waiting on a pair of Tektons hopefully next month and have Elac UB5s to hold me over. I found that my Hegel H90 could not do these UB5s justice on more dynamic music, but the M5si is making everything sound fantastic.

I will say that I’d consider the Sphinx V3 if I made a switch to a different integrated. Either that or the Pharoah. I think Rogue is a fantastic company...might as well audition both and return the one you like less, but I bet it’ll be hard to decide.