SACD

The most ear appealing, for me SACD, is Gaucho by Steely Dan.  The music erupts from a very black silence and surrounds you with crisp clear sound.  Steely Dan has always been known for some of the best studio to record/disc sound quality.  Fleetwood Mac Rumors also stands out as sound quality better than the CD version.  Need to get some Greig SACDs.  The quality of the studio mix determines the ultimate sound quality.  For me, SACD sounds so much better than the 1970's four channel or quad sound.

I am a fan of SACD. My suggestions are:

Patricia Barber - Companion
Roxy Music - Avalon
Jennifer Warnes - The Well
Weather Report - Heavy Weather
Something Else - Cannonball Adderley

Santana, Abraxas.  Great recording

I have a good amount of the iving stereo catalog released on sacd, most of which sound pretty good to me.