DAC for dummies

I recently purchased Aerial 5t speakers. I heard them paired with Moon products and it was awesome sounding.  I am going to pick up the 340ix integrated and the 260cd player to go with.  I have never had a DAC before and am not at all knowledgeable about them. I am planning on adding the dac component to the amp or cd player.  I hear the are a good dac.  Do I need to have the dac upgrade in both or either one? If it can be in one or the other does it matter which unit?  The upgrade adds about $1000 to the price.  Should I even consider a seperate dac at that price?  My source is about 95% cds.  I have no interest in streaming.  Really could use some advice here.