Is there a Solid State amp that can satisfy a SET guy?

Good for you enjoying the M-60s. I have the MA-1s, excellent amps, if you use a DHT preamp with the M-60s these are so transparent that you will get the DHT lush sound, such sound although amazing is not my cup of tea for every day listening, I rather have a pre with 6SN7s, but that is just my preference.Congrats on the OTLs, it is hard to go back to SET or SS from there.

Others probably won't know right away, as you did, what these amps could deliver.

+1

@luisma31 Can you say what dht pre you were using?

And congrats on the new amps @mglik ! A great outcome.

Supratek Cabernet Dual with 300B on one stage and 6SN7 on the other stage, in both cases the OTLs will preserve the nature of the sound in such a transparent way, I’m a neophyte with a short audio experience compared to many of you and professionals in the industry and just recently had the chance to empirically understand the "transparency" concept which Ralph @atmasphere commented to me years ago about his gear and I thought I understood what he was describing and I wasn’t, I thought transparency was a synonym to "clear" and "detailed" and kind of his but the real concept is "passing through unaltered", but you need to try gear on your system to find out about the differences (duh).
The OTLs of course will provide dynamics and gain on the sound with perfect clear resolution but they won’t provide color, or even harshness to the sound and won’t change the "nature or tonality of the preamp sound". This is a blessing but also a curse, beware, you feed crappy sound and you will get crappy sound. I run an MP-1 on my system which (again) Edit:could be for the lack of a better word "disgustingly transparent", your source is magical you get magic, your source sucks and you will be disappointed.
I thought on mentioning this since the OP got OTLs and he should be enjoying these very much.I don’t doubt SS and SET amps could be good but based on my limited experience if you want to experience SET sound you could perfectly match SET pre with Atma OTLs.I’ll be happy to provide more details @cal3713 if
you ask

@luisma31 Great, thanks so much for the details. Seems to be a bit of a consensus that people prefer the 6sn7 circuit in the Suprateks.

I have SS amps (First Watt f4 monoblocks) that provide only current gain and have very little sound of their own as well (and have had both m60s and 300b SET monos in the system). Currently have a 6sn7 pre and have an eml-20AM based dht on the way. I love the current sound, but am also looking forward to comparing the different preamp typologies. I'm cheering for the dht because it's a custom build and resale will be difficult, but as always, the proof is in listening and whatever sounds best wins. As you accurately state... you only learn by hearing the gear in your system.