overall I would say something that would bring everything together more
Would you say you’re looking for more detail or air in the treble, more tonal richness or color, etc.? Or, put another way, what to you seems not as together as you’d like currently?
Here’s a review of several outlets I found interesting as they’re compared directly to each other (and includes the GTX-D). I came away intrigued by the Cruzefirst Maestro outlet for its design, sound characteristics, and value.
https://www.enjoythemusic.com/magazine/equipment/0114/audiophile_ac_outlets.htm
Here’s another review that had similar findings…
http://www.6moons.com/audioreviews/sablon2/3.html
FWIW.