I agree with Pops completely. Hardly any reissues IME sound as good as the originals. True, the reissues are often quieter and they don't have the mistracking damage that the originals have often suffered. And you can buy them without having to leave the comfort of your home. But if we're talking only about sound quality, a clean original is nearly always better. There is a natural, effortless flow that so many recordings from the 50's and 60's possess, and it doesn't come through to the same degree in a reissue.
I know these are blanket statements but this has been my experience.
Dave