DAC for multiple CD players?

It sounds like your wife likes the multi disc player. I use an inexpensive Sony DVD changer with a Bel Canto DAC 1.1 and am very satisfied. John Stronczer of Bel Canto even recommends using his dacs with a dvd player. You could also just use separate inputs on your Plinius for each player.

I'm using an old but wonderful California Audio Labs Alpha DAC connected to a CAL Delta transport via a balanced connection and to a CAL CL-10 5-CD carousel player via digital coax. The Alpha also has a toslink input which I've used periodically to connect to an otherwise lousy sounding dual-drawer CD recorder. I'm sure there are many other DACs with similar flexibility. With the Alpha, you can easily switch between inputs via a button on the front panel, which is convenient, and they can be found used on Audiogon now and then.

That is what I hope to do, use a DAC for both the single CD player and the multiple CD player. I'm not sure how a find the DACs that can be used for two players. I will take a look at the Alpha DAC.