Which SS integrated amp to choose?


Guys, will appreciate your recommendations for a good sounding second-hand SS integrated amp with output power 100-150 w (at 8 ohm), weight up to 30 kg, budget up to 4K, age starting around 2000. My list now includes Gryphon (Atilla, Callisto 2100/2200), PassLabs INT150, Luxman 507/509. Not on my list are Hegel, Accuphase, Parasound, Marantz. Looking for balanced, on a warmer side, detailed, open, full bodied sound at my SF Guarneri speakers (86 dB, 6 Ohm). Feel free just to name the option or suggest yours. Thanks!
apanhc
Have a look at Marantz PM10 which doesnt get much love and I can't understand  why.   Makes no sense, it's really good. For the prices you can buy used it is crazy good.  Been running it for two months and I am very impressed.  Love the class D, no heat, very detailed and smooth at the same time.  Great transparency and thunderous bass.  It is really good.
Take a look/listen to BAT VK3000SE.  It meets your requirements except for two tubes on the input side.  I use mine with Sonus Faber Cremona floorstanders.  It outperforms my prior integrated, a Hegel H200, and performs well compared to my previous separates including Pass, ARC and Pass Labs.  Music Direct carries them as I believe they took a financial interest in the company a few years back.
Thank you all so much! With your help I've got few important ideas for my search and models to look for and listen. But I'm still wondering if anyone has experience with mentioned Gryphon models? There are few realistic reviews of Diablo's, but not so much about Atilla and Callisto, plus the fact that Gryphon name itself is somehow mystic meaning that all references are great, but mostly from reviewers...
Sorry guys, to be fair there is a lot about Gryphons here, so I have to do my homework first :)