The DV45A and the DV47A use the same AUDIO D/As...192KHz/24 bit...three of them. The 47A VIDEO D/A is 108MHz/12 bit...whereas the 45A is 54MHz/10 bit. If your main interest is audio, the 45A is obviously the sensible choice. The 47A would theoretically perform better in the Video area, but you might need a High Definition monitor to see the difference.
Also, for audio, you need SACD capability which the Marantz reportedly lacks. Audio quality wise, I don't think there is much to choose between DVD-A and SACD, but you need both if you want to find a decent selection of discs to buy.
Also, for audio, you need SACD capability which the Marantz reportedly lacks. Audio quality wise, I don't think there is much to choose between DVD-A and SACD, but you need both if you want to find a decent selection of discs to buy.