receptacles

Deepak007,
Both the Maestro and the Avatar Afterburner 8 utilize un plated metal receptacles. Some feel that as a result they both are more natural sounding than those that employ a layer of plating. I'm certain results vary depending on system/components (as does everything else in audio). It has been reported many times that the Furutech GTX D needs "hundreds" of hours to fully burn in. So your assessment of the GTX is probably premature. I'm intrigued by the Avatar Afterburner 8 and will try one in my system (wall outlet to my BPT3.5 Signature Plus balanced power conditioner).
Good luck in your search.
Charles,

John,
The OP isn't seeking warmth, he's pursuing clarity and neutral/natural character.

Al,
When I read these threads I just assume that the basics and fundamentals of good system set up have been addressed. It's entirely possible I may assume too much!
Charles,