Looking for a SS integrated Amplifier recommendation going into a new system

I have the Ascend Acoustics Sierra Towers w/RAAL and I run 2 different amps.
SS - Peachtree GaN400 ampTube - Raven Blackhawk Mk. 3.1
Both amps sound good with those speakers.

the rega brio R sounded class A "tubey warm" to me when i gave it an extended listen. 50 watts per side. totally unharsh with waveform-rounding circuitry at max power to avoid clipping. acts somewhat like an SET in that respect. runs somewhat warm, just like a typical class SET. sweet trebles. round bass. compact. 

Hegel H590, maybe a bit overkill unless planning for future component upgrades.

I have similar musical tastes to yourself and home demoed a few SS integrated amps. It is worth trying to hear a few as some, to my ears, are over-detailed and fairly dry sounding compared to the sound signature you describe that you prefer.  I would recommend Vitus for a very natural, slightly warm, very rich sound, especially the SIA-025 which is class A. Or for a warmer, more velvety, but less detailed, sound then the Luxman range. 
Personally I preferred the Vitus as the Luxman sound was a bit too dampened, but on certain music it shone. Given the warmth of a 50s Sinatra recording and the Luxman was to die for. But move to a classical piece and the Vitus shone brighter.  Overall to my ears the Vitus has the best of all with little compromise. 
I have not heard Pass amps but hear good things. 

The musical fidelity mx8i or a second hand Daniel Hertz. But the mf is much bether than the luxman.