I bought the three soundtrack LPs in the 1980's, four if you count the Utah Symphony "Trilogy" LP which was the only place to get the full "Jabba The Hutt" theme and "Darth Vader's Death" so those are what I listened to for many years, until the Anthology CD set came out. I was disappointed with all the missing music from the LPs, so I was thrilled with the Anthology, which filled in most of the missing music.
I also purchased the Skywalker Symphony CD in the '90s, but I ended up selling it because I was very disappointed with the recordings.
The RCA SE soundtracks filled in even more missing music, but of course the ROTJ sdtk lacks "Lapti Nek" and "Ewok Celebration." So, I still listen to the anthology for those tracks, and a couple other alternate tracks that didn't make it onto the SE CDs.
With classical-type music, I prefer the silent background of the CDs, in spite of whatever sonic limitations they have, so I still prefer them to the LPs.
For SW and ESB I generally listen to the SE soundtracks because they are the most complete. For ROTJ, I've made my own CDs combining mostly the SE tracks with the OOT Anthology tracks to fill-in, and the "Jabba" track from the Utah Symphony Star Wars Trilogy CD (on the Varese Sarabande label).
Overall, my favorite score is ROTJ, my favorite track from it is "Luke and Leia."