I don't have any hands-on experience with either brand, although some older Marantz players have had some trouble with the Secrets shootout tests . The NAD players look nice - I don't know anything about their actual performance, but it looks like they probably have a more substantially engineered analog audio section than a lot of players. There's one review of the T571 at AudioReview that might be useful if you haven't already seen it. The Marantz does offer DVD-Audio, whereas the NAD changers do not.

If you haven't already done so, I'd try to take some demo discs to a dealer and look at the players for a bit.

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gonk -- 950 Review | LFM-1 Review | Pre/Pro Comparison Chart | Saloon Links