I still have a Luna running in a second system. Very versatile amp, as it can be used as a pre or a power as well as an integrated obviously.
I think they are 40WPC with built in MM phono stage.
It has been serviced once since I bought it new around 1998, but this was because the source selector switch became faulty. I haven't changed any caps etc, so it may not sound as good as it should, I don't know really.
Not the last word in transparency, kind of a slow, warm sound when driving Acoustic Energy 109 speakers. Very different to the Nait 3 I tried at the time, which was quite harsh in comparison.
Nicely built with metal clam-shell case too.