The new Katatonia "Dethroned & Decrowned" is pretty good too. Best record since GCD.
Anathema "Hindsight" & "Weather Systems" are both beautifully produced. Good albums too.
Did you ever hear the 5.1 mix they released in lossless on the website for weather systems?
Moving Pictures by Rush has been already mentioned a couple of times, but I'll mention it again, as in my view this should be a benchmark by which all other productions are measured. I'm not really a great fan of Rush, but this album is recorded and mastered to perfection.
A couple of other surprisingly good sounding albums that I haven't seen mentioned here yet:
Iron Maiden - Powerslave
Morphine - Good