I really like how analog the Schiit Gungnir Multibit A2 dac sounds using a Sony DVP-NS999ES as a cd transport.
Sound quality is DIRECTLY comparable to a Thorens TD125 MkII with Shure V15 IV/Jico HE; a Sony PS-X75 with various Audio Technica beryllium styli/carts; a Sony TCK-777 cassette deck, and streaming using HD and Ultra HD files from Amazon Unlimited thru an HP audio-centric I7 laptop over Google Fiber. Every one of these is great on there own and can sound as good or better than any of the others in my system depending on the recorded quality of the media / production ect.
I did quite a bit of research on the XA5400ES, XA9000Es, and some of the older ES players as cd transports, and decided to try the DVP999ES/Gungnir combo for the same price as a used XA5400ES. The Schiit dac takes the already excellent Sony DVP to another level. I hear their Yggdrasil dac is a solid upgrade over this one and competes with 5-10k dacs for just 1000 dollars more than the Gungnir (which I have no desire to change right now).
I’ve never heard an XA5400ES before, but I can wholeheartedly recommend trying a Schiit Gungnir or Yggdrasil dac when (if) the upgrade bug bites you.