I was about to pull the trigger and get 30th anniversary 'Dark Side Of The Moon', when I saw this on E-bay:
'Wish You Were Here'. Original 1975 pressing. This is so good, for both the quality of the songs and the SQ. The record was dirty, and full of crackles, but after a clean, it's faultless. The stereo imaging on this is top-notch (Welcome To The Machine is a brilliant example).
I also bought 'Delicate Sound Of Thunder', but it hasn't arrived yet. I hope it's as good as this.