Atma Sphere is very much still around and they are very popular with Soundlabs owners but they are very expensive even used. For ESLs the Soundlabs are very easy to drive. You want at least 100 watts/ch. Between 1-2 K is tough. A used Parasound amp might come in under 2K.
You will have to play the used market and see what is available. If you can find an AB amp that gives you the first 10 watts class A that would be great.
You will have to play the used market and see what is available. If you can find an AB amp that gives you the first 10 watts class A that would be great.