OH! I forgot to mention the MFSL (Mobile Fidelity Sound Lab) half-speed masters that I have! They're awesome!
I have one "perfect record" - it's a direct-to-disk pressing, John Klemmer (sax player) and the most clear, perfect-sounding, clean jazz sax ever! Arabesque
Yeah, most of my Mobile Fidelity LP's are the 1/2 speed masters.
Love that warm sound from them.
Pure Prarie League is another good MSFL pressing