Dear MichaelC,
I use an NS01, this is the non-screen version of the HDX - and doesn't allow you to add a PSU, thank God.
I use this on the front of my EAR/Living Voice system. It is brilliant.
I do not claim it rips 'better', but it makes the process completley pain free.
I do not claim it is a better stream renderer, but I am not convinced there is much to be gained, and there is much system dependence.
Maybe comes down to whether you are into the music or the HiFi.
M