Looking for any feedback on the PS Audio Stellar amps

Looking for any real feedback on the Stellar amps. Any comparisons to other amps will be greatly appreciated.  

I wonder if this would sound okay with a Primaluna Premium Prologue Preamp.

Thinking adding solid state to my system.

I have the s300
Its the best amp I’ve owned, over Luxman, adcom, maranta. It needs a good quality preamp to Perform at its best. Unbelievable power and sound quality for the price.