Undertow, the 200 gram Classic Records reissues are very good.....i bought them 4 or 5 years ago when they came out. it was the best i had ever heard LZ.
then came the Box Set with the first 4 LZ albums boxed together with a 45rpm test pressing of 'Stairway'......i bought 3 complete sets just to make sure i had a 'lifetime' supply of 45rpm 'Stairway'.
then last summer i bought the complete LZ Classic 45rpm box set. if you get a chance to listen to it.....it will blow your mind.....and the difference between the 33 and 45 is huge.....sorry to say.
yes; in 1971 i was younger......but for music quality.....these are the 'good ol' days'.
side note; one of the engineers for Led Zepplin II, Chris Huston (his name is on the bottom right side of the inside cover), was the acoustical designer of my room and stayed overnight as a guest in my home during the room project. that evening playing music which he had produced and enginered was one of the most fun listening i have ever done. he had more than a few great stories to tell about recording LZ and others.