I've got perhaps a dozen hours on the tubulus, and less on the new optical module deluxe, but I can assuredly say that my system has reached new heights--new levels of detail and resolution with even more involvement than ever before. Some of the challenges we sometimes face when chasing extreme resolution is the loss of involvement with the music, cookie cutter imaging, harshness, and other features we label digititis. My system is displaying none of those symptoms. Attack and decay sound real. It is very easy to pick out every expression and nuance contained in a recording. Yet, I find myself drawn into the music and able to let it wash into me without focusing on every little detail, yet the details are there.
The tubulus cable seems to bring more of these positive qualities but with a lot of subtly. It replaced a wireworld silver starlight, no slouch, but the tubulus is already better. It was worth the cost to me. YMMV. And I look forward to continuing evolution as the cable and the rest of the system keeps settling together. I do feel the 006 and gaia are mostly stabilized with at least 400 hours of running time.
I did run the system for a short period of time without my optical moat in place. I moved a few components around. It was a big disappointment running ethernet straight into my aurender. I lost many of the good qualities that are present with the moat in place.
Optimizing streaming can be daunting and expensive with much trial and error required. However, it is definitely worth the effort.