The quality of transport is the most important part of digital playback. I've tried various combinations of transports and DACs and every single time transports made much bigger difference. If you are investing in digital separates, spend the money on a good transport first, you won't regter it.
Also, if you are mainly interested in CD, get a stand alone redbook transport. Universal players never achieve the same quality in CD as CD only transports do.You can get a great used CD transport for very little money these days.......