Well, after so many tests, and the opinions of all, I reached the conclusion that HaloClean2 + MagicUp is the best compromise (IMHO, of course) *in this very moment*... maybe in a month, maybe in a year, I will find a better solution - even if I'm pretty sure it will be hard, as I think it's quite impossible to do better than this, with laserdisc as video source.

The lossless video is ready; I just have to work with the soundtracks... this evening I'm really tired, so for the first time in some months, I will not touch avisynth and/or virtualdub... "Sacrilege!!!" someone will yell (-^,) I know, I know... but I'm human, after all (am I? or feline?!? dunno...) - I'll be back to work ASAP.