Only that my laptop sucks for audio. It made the X-Sabre not sound ideal, and CMA800R revealed that flaw. Fixed by switching to external USB-hub (will maybe try schiit wyrd when the EU version comes). Now I'm very happy!
Don't forget Questyle CMA800R. I am running it SE from X-Sabre and enjoying the combo immensely! I had some initial problems, but that was on my end (crappy USB-out from laptop amongst other things). You can run it 2x monoblock in balanced. I recommend you look at the updated review from Project86.
Yeah I read that too. However I think CMA800R is an amp that you needs to grow on you. I can see why someone would say that at a meet. I am very happy pairing it with X-Sabre for now! Not dull sounding to my ears.
I agree, some DACs have this edge in snare drums that makes new recordings sound harsh and strident. The X-sabre have this nice "softness" about it that makes newly mixed albums sound much better while keeping a neutral tone overall. Also the soundstage of the x-sabre is both very wide and deep.