Right......
I understand you were talking about the line stage.
But you did mention the 333, which includes the phono section, so I was just putting what I know about the piece, and my own experience with it, out there.
Also, a product's performance can sometimes be inferred by the performance of other offerings from that same manufacturer.
Visit audioreview.com. Lots of folks over there complaining quite loudly about Melos preamp reliability issues. I never had problems myself, but remember hea ...
the photentiometer wolume pot certainly was the main cause of melos going bankrupt. even tho it sounded great, it was so sensitive, that the slightest jostling during shipping could cause it to stop working. and anyone here that has had shipping issues knows that isn't good!

which is why melos' last preamps had alps pots - sonically not as good, but far more reliable. still excellent sounding preamps, imo - my ma333 was conwertred to the alps pot before i got it, & it sounded great, even before the tube wolume pot mod. but, for the old melos, the damage had awreddy been done, as all the bad press on audioreview.com indicates. melos could never recover from all the damage done, both financially, & from irate customers. too bad, really. the m.a.r. tube wolume pot is the best of both worlds, imo - transparent *and* reliable.
re: the ma333, there's certainly a fono stage included in the agon ad i referenced, but they were optional; as i've said, i've never heard it, tho i own a ma333.
re: comparing other gear, i agree - it's good to have reference points. re: the rogue 99 magnum, my experience flies in the face of many who love this gear. i would rather have gone back to my linn kairn, cuz the rogue was so coloured, & had no low end. its soundstaging was way overdone, imo, no focus at all - tubes gone wild!

and, it was so microphonic, it would ring if ya *looked* at it the wrong way. re: the cary slp98, it was actually nice, tho a bit dark, compared to the linn. while i ultimately woulda chosen it over the linn, cuz i like what the tubes brought to the soundstaging, the melos was really a whole different animal - everything great about solid-state, plus tube soundstaging. i really have never been motivated to want to "upgrade" it. and, it's performed in a stellar fashion w/all manner of amplification - solid state, push-pull tubes, set, digital...
regards,
doug s.