I'm the reviewer from HTR and wrote the review on the DI's. I completely agree that a "snap" judgement about any piece of gear can come back and bite you in the ears. However, I spent many,many hours listening in the context of my reference system before I came to any conclusions about these great speakers. I'm a tonality/timbres listener first, if these qualities are not in place in a speaker I really don't care about dynamics or bass extension.
There is absolutely no "listener fatigue" at all with the DI's, just purity of tonality/color, plus great over-all dynamics and what I call a sense of aliveness you find in music being played in real time. As I stated in my review, "garbage in-garbage out", so I believe if you drove this speaker with crappy electronics you would not like the end result. Easy to drive yes, very inexpensive for what they offer, so I could see a music lover on a budget purchasing them and building around them for many years to get the total ultimate level of performance.