@facten
I auditioned the LM216. It is a really good looking machine, but the sound quality was disappointing. There was even mains hum?! Also, I heard ringing.
As as regards the LM518, I remember reading a less than stellar review in the Stereophile magazine. JA found the amplifier to be noisy. While the rest of the review was passable, I have a strong preference for very quiet amplifiers.