Also, I’ve found laptop USB interfaces are usually very poor quality when compared to desktop. Another suggestions would be reclocker (such as Remedy Reclocker by Wyred 4 Sound). This may make the audio much more solid and better.
Moving up to better silver/silver-plated based USB cables can also improve things.
That being said, it’s going to be extremely hard to beat your McIntosh MVP 881 as both a transport and a DAC/player.
Also, what DAC are you feeding the laptop into?