My newest player elevated my redbook cd playback to such an extent that the SACDs it plays don't sound tremendously better, a bit better, at least so far. Some users of the same modified SONY as I have say I just haven't "broken in" the SACD section enough yet, which may be true, as I don't play SACDs that often. As a result I haven't felt compelled to buy a lot of SACDs and haven't; I have maybe 20.
The two I wouldn't live without are "Louis Armstrong Plays W. C. Handy" and "Planet Waves." Both are sentimental favorite recordings, and both sound pretty darned good on SACD to me. Especially the Pops. Magnificent in all ways!