if you can, compare momship to the 80's diament mastering like i did.try this: turn up a diament cut til plant is pretty loud. all will be well, i promise. now - swap it for mommaship and turn up that same song til plant is as loud as you just heard him on your 80's cd. i promise that your ears will hurt from the loudness/piercing quality of one instrument or another.
I have observed the same problems with remasterd Toto albums (orginal Grammy Award winning stuff damaged through incompetence of remastering engineer and producer) - the orginal 80's first CD release sounds better..
What you describe above is exactly what you hear when it has been mastered "hot" - the modern remastering uses compressors to compress the dynamimcs of the original master tapes so that the CD sounds perceptively louder....but THIS ADDS DISTORTION. Do a google on "CD Loudness wars" it is absolutely criminal how the industry is destroying good music! BTW Led Zeppelin sounds awesome on ATC SCM 100's - anyway that is what Robert Plant uses at home...so I guess it should.