MacBook Pro to EMM XDS1

Yes, the XDS1 is a brilliant machine. If you don't require the last mile of neutrality, I also recommend the Playback MPS5. I've heard it in my system and it sounds beautiful too. Very similar to the XDS1 but perhaps a bit more oomph in the mid bass which is a nice characteristic. For the price though, it's a relative bargain compared to the XDS1.

I actually owned the MPS5 for a while and did hear a more prominent upper bass, but it was actually a negative for me and I found it a little blurry and had the impression it was there when it wasn't supposed to be. This was based on many CDs I was familiar with (60's-80's popular music, clearly not the best recordings). The EMM sound (especially the XDS1) to me has the best bass, a see-through bass with no pumping or opaque sonics.
In fact, I keep coming back to EMM because the natural bass is so much better than other digital sources I have heard.
The MPS5 bass seemed to tarnish the lower midrange, slowing them down. Curiously, I found a similar upper-bass issue on an expensive Burmester I had in my system for a while.
To me, the EMM bass rules.

If only they saw fit to include a DSD USB input :(