Buy new CDP or just add a newer DAC?

I have a slightly used Pioneer 79Avi DVD player which I am now using for music. I am considering upgrading to a newer player, but was wondering whether I'd be better off just adding a new DAC rather than buying a new CDP.

The transport on the unit seems pretty sturdy and I've never had any problems which makes me think a DAC may be the way to go.

Any suggestions?

Thanks.