Mark, since I`ve been impressed by quality reissues of King Crimson, Blue Note 75th anniversary series, the MFSL Bitches Brew and Sony Legacy Kind Of Blue I`ve found out that, apart form the Crimson records there are even better pressings, some of which you have. Seems like the master tapes are made available not on an exclusive basis. I can make a comparison of the standard Crimson albums to the 200gm reissues. Crimson are notorious for long quiet passages..and loud powerful passages. At first you notice they are not as pinpoint in focus but soon realise there is more info on each note...decay, timbre, atmosphere, making it all sound fuller and more realistic. Louder, no, but that may be done in the process. It`s akin to when you first hear the difference a mains conditioner makes.
In general though all or most of my normal weight records are fine, it`s kind of what you`re used to. It`s a pity Zappas Discrete label didn`t diversify. His recordings really rank in quality.
When I had a reel to reel in the 80`s I never really liked to play it as `a player` because I felt out of my comfort zone to the normal records. I used it as a pre amplifier for guitar and to mix down group recordings to cassette. These thick albums are getting there because as with the speed of the reel to reel they are getting more info into the grooves.
Then theres the Classic 200gm Super vinyl. Theres a huge write up here. scroll down.
http://www.ebay.co.uk/itm/SS-90051-Led-Zeppelin-CODA-200g-Quiex-SVP-Vinyl-LP-Cla...So there`s some good deals to find if you shop around.