replace Toshiba SD-1600 — DVD Players — DVD MP3 AVI MP4 players codecs conversion help

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have a Toshiba SD-1600 that was bought Auguest 2000, and runs great.
BUT - it won't play any of the newer format -R stuff and others.
SO - looking to replace a perfectly good DVD player....
suggestions or comments on replacing the Toshiba SD-1600 ?