There has been a lot of discussion about the MM reissues (either in 2x45rpm or 33.3rpm) versus the RVG originals. The issue will never be resolved, because they are sonically so far removed it's almost like comparing different recordings.
I always seem to get the impression that the MM's are more faithful to what's actually on the master tape, although I obviously never heard or will ever hear what's on those tapes. The MM's sound incredibly clean and free of distortion, while still having realistic dynamic punch. This is often how people describe master tape sound and each time I hear one I think it can't get any better.
But all that sanity is thrown out the window the moment the needle hits an original. Yes, these records were cut 'hot'. They're very loud and can be a bit uncivilized, sometimes harsh and even shouty. I can imagine this being too much for a high efficiency horn based system. But in terms of sheer exitement nothing really compares.
Oh, and top grade NM copies of the originals are not really noisier than modern vinyl. But finding such copies has become almost impossible, unless you're prepared to pay a small fortune. Actually, in my experience even 'well used' copies can still sound quite good, try that with 'modern' vinyl. Thanks to the loud cut the music will easily overpower any surface noise.

