Honestly speaking, you'd be very hard picked to pick up any audible differences between 2 similarly-designed solid-state DACs/amps with comparable numbers, provided that there are no output power/impedance mismatch issues. Slight volume imbalances and human perception/bias add a layer of variability that is orders of magnitude higher than the actual differences in sound.
In your specific case, however, I dont know the quality of the X1000's amp section, so cannot comment on how it is going to work out. Knowing Denon's general high quality, I doubt if you will notice much of a difference.
Thank you for the thoughtful answer. I'll just have to wait and test it out. Appreciate it.