I owned the Enleum’s predecessor the Bakoon 13R, it is not in the same league as the Envy. Ive compared Enleum 23R also and didn’t feel it offered much over the Bakoon. Ive not compared the Primavera. As always try and get a listen for yourself.
After these comments below regarding the Sikver Fox amp, I wonder how it compares to the Envy??
“One of the best surprise is how big and spacious the Fox's soundstage. Easily beat Enleum, and Ferrum stacks (Ferrum being the narrowest). I think this is simply the biggest soundstage from solid state amp I ever heard. The imaging structure also "sharp and neat", combine with good density in notes, really create lively feeling from music”