Don't forget Joule Electra. Jud is gone but Rich at Signature Sound can repair/upgrade as needed, but they are as reliable as tanks. Used LA-150s rarely come up for sale but, given that the company is no longer in business, you can get used joule gear at steep discounts when it does come up. I happily ran a 150 for years before upgrading to a LA-300, truly and end game preamp.
The Joule gear is quite special.
I have a 150 in my closet. If any interest, feel free to send me a message.