I have owned many cd players. I am currenty listening to a xa9000es. It is as good as I've heard w/sacd... It is also very good with redbook cds, imho. Possibly other room/equipment matching issues has caused some owners to not apreciate the redbook performance. I have not heard the xa5400es...but think it would carry on the sony tradition of "analog sounding" cd players, scd-1, xa777es ect...if there is such a thing.