I'm not an Abba fan by any stretch, so no expert, but to me many of the earlier recordings sound pretty ropey to start with, i.e. did so off vinyl too. I know the early CD pressings are *very* collectable, blue Polar or red-face Polydors etc. Whether there is a good copy of Gold or not I've no idea, though compilations tend not to be great as the mastering engineer obviously can't make the bad recordings better so often tends to make the good ones worse to balance the disc as a whole! I'd be more inclined to hunt nice masterings of the original albums, and with Abba I'm pretty sure that is the early-80s pressings.