A relatively inexpensive changer that sounds unusually good is the Decware DEC-685. This is a modified Sony DVP 685 changer and is now discontinued. However, I believe Decware may still have some for sale. I have had one for over a year without any problem. It works well as a player or transport. The modification implemented is merely adding a tube stage to the output of the decoder chip and bypassing all conditioning and hardware filter circuits.
http://www.decware.com/SACD/sacd.htm
http://www.decware.com/SACD/sacd.htm