I know many people will disagree, but once again:
Normal, vanilla Redbook CDs can be made to sound perfect. Early CDs sounded artificial because the mastering process was primitive, hence the false belief that CDs don't sound as warm than vinyl... Blame the mastering, not the medium ! Recent MK CDs mastered at British Glove sound amazing.
SA-CDs, aside for surround mastering when it exists, offer higher horizontal (192khz instead of 44.1) and vertical (24/48/96 bits instead of 16) resolution than CDs. There is strong scientific evidence that the human ear will not make the difference, everything else being equal of course (same master).